Sed extract number from string. 1 (release mode)" | sed -ne 's/.

Sed extract number from string Apr 28, 2024 · To extract specific information from a string, you can use commands like grep, sed, or awk with regex patterns that match the desired information. I’ve created a file with the following text. d. echo "ifeelfat398pounds" | sed -n -e '/ [0-9]/,/ [0-9]/p' This is a very simple task but How to use sed to extract Nginx version number (only) from output string? [duplicate] Asked 5 years, 5 months ago Modified 4 years, 8 months ago Viewed 1k times Jan 16, 2013 · Straight to the point, I'm wondering how to use grep/find/sed/awk to match a certain string (that ends with a number) and increment that number by 1. A sed -r 's/^[0-9]+\. I would first start with grepping for the line grep opt Jul 6, 2024 · To begin with, we used the Bash, awk, sed, and grep commands to split and extract the parts of the string. To make them special, they must be escaped with a backslash. Jun 12, 2021 · That's using sed 's default Basic Regular Expressions (BRE). *\([0-9]\+\. 17 hours ago · String manipulation is a fundamental task in shell scripting, whether you’re parsing log files, processing user input, or transforming data. The best way to do this is using regex in sed to extract whatever comes after \. titi. 21 ipc 222 stalls n shdmem 112 So Mar 16, 2017 · How do I extract the digit(s) before last dash(-) and . Substring extraction is essential for text manipulation. )?([0-9]+)-. dem_par | awk '{print $2}' Jan 2, 2013 · 1. Oct 19, 2012 · Out of interest do you think there is a way to use the \1 at the end - perhaps extract all numbers (contiguous digits) as substrings and ask for the second one. To output all the text from file called […] Mar 25, 2014 · And I want to extract only 203,376,578,765,803,809,811 that occurs after line 30 Jobs Done. May 20, 2013 · Both the awk and the sed scripts — at least on my machine with my copy of the data file you provided — print 5 blocks of data between START=A and END, and the blocks with START=B to END, START=C to END and START=D to END are all omitted from the output. dat) that looks like: Parameter stuff number 1 (1029847) word index 2 (01293487), bla bla Parameter stuff number 3 (134123) word index May 9, 2017 · Technically the OP asked for sed, but I feel like this is the best solution for "How can I strip the first X characters from string [in a terminal/bash]" When used in combination with git, it is nice: git log --pretty=oneline | cut -c 42- | head 2018-08-22T00:11:16. Regular expression syntax varies a lot so you need to reference the help file for the regex you're using. Jun 6, 2017 · I have a string in a file of the format opt1= abc opt2= 3 opt3= 10 opt4= 0 Now I want to read out the number after the opt3 for example. Explanation: NUMq will quit immediately when the line number is NUM. *\n). Can anyone tell me what I could add to get the output I'm Dec 21, 2009 · I would like to extract a number substring using sed. Example of Regex Substring Extraction with `sed` To extract the numeric value from a formatted string, you can use: May 27, 2021 · SED command to extract 4-digit numbers from string Asked 4 years, 5 months ago Modified 4 years, 5 months ago Viewed 3k times Sep 17, 2008 · sed -n '16224,16482 p' orig-data-file > new-file Where 16224,16482 are the start line number and end line number, inclusive. , ignore lines without any numbers)): awk -F'[^0-9]*' '/[0-9]/ { print ($1 != "" ? $1 : $2) }' -F'[^0-9]*' defines any sequence of non-digit chars. How do I replace text using regex in Bash? Sep 5, 2014 · You're parsing some text to extract the username from a domain\username string, most likely from Windows. *\([0-9]*\) apples/\1/p' However, I get '65', if both digits are matched separately as given below: echo "This is an example: 65 apples" | sed -n 's/. [0-9]{1,3}\. It makes 2 distinctions: (1) obsolete versus extended regular expressions; (2) non-enhanced versus enhanced regular expressions. tata. May 30, 2017 · There is a unix tool called sed which uses some RegEx-based syntax but has other peculiarities special to it. Plus the method is different in each language. 0. $/\1\2 Jun 30, 2017 · (replace with the empty string all that isn't a : followed by :: at the start of the line or the first . c. com from http://unix. In a bash or zsh script, how might I extract the host from a url, e. 3 Overview of Regular Expression Syntax To know how to use sed, people should understand regular expressions (regexp for short). For example: echo "Version 1. *\), access capture groups with \1, \2, ect. *-([0-9]+\. example: string1="something34521. [0-9]\+\. I would like to extract string2 from the square brackets; but the brackets may be surrounding any other string at any other time. the first word on the line). This can be useful in various scenarios, such as parsing log files, processing command output, or manipulating data. The system supports sed which is likely the best route, but I'm unfamiliar with that application. If you really need that performance boost, don't do this in an interpreted scripting language at all. Jul 6, 2022 · If you want all (integer) numbers and all IP (v4) addresses, add an alternation to the regex with grep: | grep -oE '[0-9]+|[0-9]{1,3}\. I have a big file which has the following set of lines repeated Expression loweWallrhoPhi : sum=-6. In list context, a regular expression returns the matches defined in the subpatterns. Here's an example string: Test: 1000 calls, 15307 milliseconds, 11 minimum, 37 maxim Jul 21, 2022 · As Kamil Maciorowski noted, it's theoretically faster to do the processing inside the shell. Upvoting indicates when questions and answers are useful. 12Z+00:00 2 Santosh Kumar Arjunan Santosh Kumar Arjunan Over a year ago Nov 12, 2015 · @TonyAdams Yes there have: text-processing questions have been indirectly covered here, and anyway de-facto they have been always considered on-topic and never closed / migrated; on the Ubuntu-specificness, that has been covered multiple times, twice just recently here and in the duplicate and once here. The \d operator is a feature of enhanced regular expressions, therefore not Apr 17, 2008 · Q. 9 The notation sed 's/"//g' is instructing sed to do a search and replace on all occurrences of double quotes, substituting them with nothing, s/"//g. (including the empty string) as the field separator; awk automatically breaks each input line into fields Oct 8, 2013 · Extracting a part of String using grep/sed Asked 12 years, 1 month ago Modified 1 year, 7 months ago Viewed 45k times Mar 8, 2015 · I have a text file and want to extract only the text beginning and ending with a certain strings using sed. Mar 31, 2024 · The string is a sequence of characters. I have a file with lines like: 0 6 973 1346 2318 456 431 93 58 1 1 0 0 0 0 I want to extract the 1st, 4th and 5th number and save them in variables in bash for further use. You didn As shown above, the output includes the filename, line number and all the text in that line including the string. Apr 1, 2013 · Please check that more thoroughly: After the numbers, you have a U+00C2 LATIN CAPITAL LETTER A WITH CIRCUMFLEX and then a U+00A0 NO-BREAK SPACE, not just a single whitespace. Jul 27, 2015 · Since you want to convert everything to lowercase, using sed: sed 's/^Email subject: \(. 15. Jan 27, 2020 · I really would like to know how can I extrac some line from a text file using sed, but I'd like to extract the lines at interval: For example extract the line with number i=1:2:100 So that i can Nov 25, 2015 · I want to strip all numeric characters from a String variable, eg from: VARIABLE=qwe123rty567 to: echo $VARIABLE > qwerty I've searched many posts but they either use sed to output to file/file Aug 30, 2019 · I need to extract a negative number from a file to another file, I already did this for a positive number, but I couldn't figure out how to do it for negative number. [0-9]{1,3}' This would print the values one per line, and would of course also catch the 0 from the ETH0 at the end. This says to use sed instead of normal RegEx when applying the command string to the field to modify. Dec 27, 2016 · From the following article, you’ll learn how to print lines between two patterns in bash. In such cases removing all non-numeric characters from a string becomes essential To get the part after the first occurrence of the string instead of last (for those lines where the string can occur several times), a common trick is to replace that string once with a newline character (which is the one character that won't occur inside a line), and then remove everything up to that newline: sed -n -e ' /stalled: / { s//\ / s Nov 6, 2012 · I am trying to output a string that contains everything between two words of a string: input: Apr 15, 2024 · This tutorial explains how to extract the first number from a string in Bash, including an example. It excels in applying regex to modify or extract parts of a string. The command s/find/replace/g is what's going on there, and the trailing g to search tells it to do it globally on the entire string that it's given. Jul 1, 2014 · I need to extract a number from the output of a command: cmd. Sep 23, 2011 · I want to achieve the same as explained in sed: Extract version number from string, but taking into consideration only the first sequence of numbers or even safer, tell sed to keep only the sequence of numbers following the name of the command, leaving out the rest. *). For example: POP3_SERVER_NAME = localhost I want to return only localhost, using sed. Mar 18, 2024 · In this tutorial, we’ll learn how to extract the first word of a string in Bash. *)/\1\2/ # remove "x" from the index line start and a char from the content line start ta # if a subtitution happened in the previous line then jump back to a :b # label a s/(. 9 In this comprehensive guide, we’ll explore the ins and outs of substring extraction in Bash. */\1/p' The problem here is that it works only if the version number is in the format "a. xxx. d". " and 50. To extract a specific line, say line 15, from a file, you can use: Mar 9, 2021 · I am new to UNIX. 0 and following characters until the end of the line) Jan 13, 2017 · `sed` to extract matched strings from a file. (. First I have a data file (file. Most of the above answers are only addressing your specific example string. sed and awk solutions require that lines without parentheses be filtered out separately. *\): matches and groups any number of any character /: separates the pattern from the replacement string I found the accepted answer confusing b/c it incorporated a large regexp with the example, making it hard to extract the needed information: In sed you must escape parenthesis \(. in . 3 awk for Field Processing 2. To extract the first number: Sep 24, 2016 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Apr 21, 2021 · I'd like to match a range of digits and characters to replace them with sed; a Perl-like regex I would tend to write would be: [\d-_]+ to match, for example, digits and dashes and underscores. 4 BASH Parameter Expansion Step-by-Step Examples: Extracting Major and Minor Handling Edge Cases: Robust Extraction Real-World Application: Building Dynamic Download URLs Best Practices for Mar 18, 2024 · Have a look at how to use the sed command to process a literal string or shell variable. Mar 22, 2021 · Extracting numbers with sed Asked 4 years, 7 months ago Modified 4 years, 7 months ago Viewed 595 times I want to extract the first number from a given string. It has no concept of "integer. Feb 13, 2012 · I have tried to extract a number as given below but nothing is printed on screen: echo "This is an example: 65 apples" | sed -n 's/. com/questions/ask, if the latter is in an May 24, 2014 · So I have a line: ID: 54376 Can you help me make a regex that would only return numbers without "ID:"? NOTE: This string is in a file. sed: Extract version number from string Asked 14 years, 3 months ago Modified 2 years, 3 months ago Viewed 21k times I'm trying to find the best regular expression to extract a version number from a string. May 4, 2016 · Using sed Observe that the following returns nothing: $ sed -n '/[0-9]{2} install/p' file But, this works: $ sed -n '/[0-9]\{2\} install/p' file 2016-05-04 07:38:46 install libcairomm The issue is that, in sed's default basic regular expressions, { and } are treated as ordinary characters. And after that I neet to put this number as a string in certain variable to use this in some command. Mar 18, 2024 · Learn how to extract specific lines from a file by line numbers using sed and awk. Feb 9, 2015 · What would be the correct regex to extract all numbers, separated only by a single space - regardless of the number of non-numeric digits separating them in the original string? May 17, 2011 · sed 'NUMq;d' file Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file. Jun 10, 2024 · This tutorial explains how to use sed to extract numbers from a string, including an example. s. It can perform several functions on strings, such as substitutions, deletions, insertions, and more, making it a reliable tool for string manipulation and transformation. So, 192. I […] Nov 8, 2013 · My question can be split in 2. You can use the following methods to extract Bash substring: Jan 29, 2016 · If you don't want to modify the original string, you can extract the numbers by capturing them in the regex, using subpatterns. It is particularly useful when it is necessary to strip characters or re-arrange susbstrings. All 4 combinations are possible. One common requirement is extracting the first two characters of a string—for example, extracting a country code from a phone number, truncating long names, or validating input formats. Alternatively, one can specify -E so that It's treating your "variables" as strings because that's all sed does - string manipulation. I’ll show you how to isolate and extract strings using parameters expansions, awk, sed, grep, and more. I'm trying to find the best regular expression to extract a version number from a string. Jan 23, 2025 · This short tutorial will show you how to harness the capabilities of sed and awk for data extraction and manipulation. For example, in the line: string>![TEST[Extract this string]>/string> I want to get Extract this string How would you implement this with sed? Basically I want to get text that start with the expression " string>![TEST[" and end with the expression "]>/string> ". 9? Desired result: Component= customer-asset-tag version number=1. org, but the string from there is "Current IP Address: xxx. How should I modify the first sed so it would detect float numbers, both positive and negative? Mar 18, 2024 · The sed command is a powerful text-processing tool within shell scripting. Jul 1, 2022 · Learn to extract numbers from a string using Bash commands like sed, grep, and awk on Linux. 8-78642. How can you get 'sed' to extract a regular expression it has matched in a line? In other words words, I want just the string corresponding to the regular expression with all the non-matching characters from the containing line stripped away. With sed, to print specific lines, it's easier to use the -n option and the p command: sed -rn '/IDno=|Type=Student/p' Or: sed -n -e '/IDno=/p' -e '/Type=Student/p' The -n option suppresses output unless explicitly print. test -50. I have also figured out how to print just the specific lines of a files containing the string using the following command: Jun 3, 2014 · To complement the sed solutions, here's an awk alternative (assuming that the goal is to extract the 1st number on each line, if any (i. This text is on the third line. Let’s find out how to use sed to strip numeric characters from a string in the shell: Incidentally, the command you tried (`sed -n '/"/,/"/p') prints from one line containing a double quote to the next line containing a double quote, without editing the lines at all. Jan 8, 2012 · What language are you programming in? Some languages will break up the string in one command, while others could take an entire loop. If someone decides to add or remove a digit ("a. Master text manipulation with our comprehensive guide. )([0-9]+\. The sed man page references the re_format man page. Nov 7, 2025 · Replacing or substituting string: Sed command is mostly used to replace the text in a file. It Jun 17, 2021 · I was just wondering how would I extracted a specific column using sed?(My system has sed installed, so no awk unfortunately :( ). If I have a string like this : ABCDEF00012300XYZ. *\([0-9][0-9]\) apples/\1/p' 65 How can I match a number such that I don't know the number of digits in a number Apr 23, 2024 · The original string is like this: str-str001-002_01 str-str005-006_05 I would like to extract string before number, and after underscore, so it would be like this: str-str_01 str-str_05 I remembe Mar 3, 2014 · How do I extract the version number from string=customer-asset-tag-1. e. Let’s get started! Why Substring Extraction Matters Oct 1, 2024 · When working with strings in Bash, whether parsing user input, cleaning data, or processing command output, there are times when we need to extract numbers. For instance, we may want to calculate the sum of numbers stored in a string, or perhaps validate user input to ensure it only contains numeric characters. *) until a backslash (here, we're escaping it, so it Jun 9, 2015 · Extract version string from filename Ask Question Asked 10 years, 5 months ago Modified 10 years, 5 months ago Mar 18, 2024 · In this tutorial, we’ll learn how to extract the first word of a string in Bash. 15 > Jun 4, 2013 · You said you also want to check that the string is a valid youtube URL, you can't do that with sed since if it does not match the regex you give it, it will simply print the entire line. 5 test. txt, use the following command: See the following example: sed 3. A stream editor is used to perform basic text transformations on an input stream – a file or input from a pipeline. There is support in sed for both obsolete and extended, but in either case only for non-enhanced. " 2 days ago · Table of Contents Understanding Version Strings: Common Formats Tools for Extraction: BASH’s Swiss Army Knife 2. dyndns. The below simple sed command replaces the word "unix" with "linux" in the file. 025 is a number. The output is type: 1000 So my question is how to execute the command, store its output in a variable and extract 1000 in a shell script. We’ll use several methods to explore this, including Bash parameter expansion, awk, sed, cut, grep, and expr commands. It's comma seperated string and I'm only interested in comma separated values of the account_id's. The p command, of course, prints matching lines. I have a question regarding the awk/sed operators. 1 (release mode)" | sed -ne 's/. Nov 27, 2010 · I'm trying to extract numbers from a string representing coordinates (43°20'30"N) but some of them end in a decimal number (43°20'30. How would I use sed, etc, to do this? May 27, 2017 · string="toto. Jan 25, 2014 · The following command is working as expected and showing me the highlighted results where it finds 10 digit number. xxx". Sed is a stream editor. A regular expression is a pattern that is matched against a subject string from left to right. I’ll show how to to extract and print strings between two patterns using sed and awk commands. 168. Mar 19, 2019 · You can extract substring with below grep -o -e command: cat some. Python. 12. So, I want to extract 12300 from the You'll need to complete a few actions and gain 15 reputation points before being able to upvote. *\\\(. Example: file="123 hello" How can I edit the string file such that it only contains the numbers and the text part is removed? So, echo $file should print 123 only. In the example above the Oct 22, 2023 · In a bash script, it is often necessary to extract specific information from strings. Jul 7, 2021 · Extract values from a string that follow a specific word using sed Ask Question Asked 4 years, 4 months ago Modified 4 years, 4 months ago I managed to extract the following response and comma separate it. You can also use Extended Regular Expressions (ERE) with sed's -E option: The sub-expression [0-9]+ inside the parentheses () captures one-or-more digits. How to extract numbers from a string using regular expressions? You can match numbers in the given string using either of the following regular expressions − Enter sample text: this is a sample 23 text 46 with 11223 numbers in it Digits in the given string are: 23 46 11223 Jul 21, 2019 · Get the parts between - and - with one or two dots separating the numbers: sed -En 's/. 32somethingmore3241" Output I want Jan 13, 2015 · How can I extract 3 or more separate text from a line using 'sed' I have the following line: These tools are powerful, versatile, and can be combined in various ways to achieve the desired results. I am trying to extract numbers out of some text. This is 1-indexed. In this article, we will explore different approaches to extract numbers from strings in a bash script, focusing on Linux command-line tools May 21, 2013 · For those not wanting to use the -P flag; no other extended regex that is supported by the default grep will do what the \K does, but you could simply pipe it through sed: grep -o 'name="[^"]* | sed 's/name="//g' Jun 26, 2019 · I have a random text, followed by a colon (:) and a space, then a numeric result, then another space and other arbitrary text; for example: text: 30 (5 new) I need to extract only the number 30; for See also a similar answer but about sed (there are some few answers based on commands cut, perl and awk). May 21, 2020 · I'm trying to extract numbers from string using cat out. Later we also used a general-purpose scripting language i. 97168e-09 Expression leftWallrhoPhi : sum=6. Sep 13, 2016 · You can certainly extract that part of a string and that's a great way to parse out data. [0-9]\+\). Bash remove last character from string enables users to edit the string to accommodate the updates. As a trivial example, the pattern The quick Apr 10, 2013 · Yeah, sorry, i'll put the situation: I want to make a curl to get my ip address from checkip. I use this at work to extract tons of data from several log lines. Bending over backwards to be fractionally faster is false economy here. Dec 2, 2021 · ^[^ ]* matches the beginning of a line followed by any number of consecutive non-whitespace characters (i. -n suppresses echoing the input as output, which you clearly don't want; the numbers indicate the range of lines to make the following command operate on; the command p prints out the relevant lines. 2 sed for Stream Editing 2. The number is a float but I only need the integers before the decimal. I have a case that I want to extract version number from these kind of strings (one string at a time) like below, how should I do that? release-2. 1 grep with Regular Expressions 2. 5, ". The regex works on the directions of characters used; these characters guide the sed command to perform the directed tasks. For example, to replace all instances of the string “apple” with the string “banana” in a file called fruits. Aug 2, 2017 · From this, I want to get just the IP without the port. *\)|\1|' That will match everything (. 025"N) trying to figure out a way to pull out all numbers between any non-number but also recognizing that 30. Feb 16, 2011 · H ow do I extract digits only from a given string under Bash shell? You can use the sed, grep and other shell utilities as follows: Mar 25, 2025 · Learn how to extract text between two specific characters using grep, sed, and awk through examples. Mar 16, 2011 · I need to parse the numbers from the bolded lines using a bash script but I haven't been able to do this with the command set I have available. Although the simple searching and sorting can be performed using sed command, using regex with sed enables advanced level matching in text files. How do you pattern match using Learn to extract numbers from a string using Bash commands like sed, grep, and awk on Linux. I do this to extract the li Feb 15, 2019 · I have some text files from which I want to extract certain data. Read grep manual with the following command: man grep Read about options -o and -e. Nov 7, 2024 · I am trying to use sed to extract a substring from a string, where the substring is surrounded by other strings. Enhance your string processing skills. ]/ /g' -e 's/^ *//g' -e 's/ *$//g' | tr -s ' ' This would give me 2. 8" | tr '\n' ' ' | sed -e 's/[^0-9. Mar 6, 2019 · A question for sed and awk experts. 8. [0-9]+ //' input should do, if you copy whatever is the space between your numbers and the string into the actual command. GitHub Gist: instantly share code, notes, and snippets. Substring provides powerful features for text manipulation and processing. This is my first time every using BASH scripts and the searches I've found that could help used some grep, sed, and cut options that weren't available. . def" I want to extract only the numbers from this string. * will match digits as well as non-digits, and it keeps on matching as long as it can -- that is as long as there's one digit left unconsumed that can match the [0-9]. *at matches everything up to and including the word 'at' (and the space following it) - this is not in a capture group and so is not 'remembered'. . c"), it will break. *\)/\L\1/' infile sed command breakdown: s: asserts to perform a substitution /: separates the command from the pattern ^: matches the start of the line Email subject: matches a Email subject: string \(. g. log | grep "lineWithThisText" | grep -o -e 'SomeSequence1[0-9]*[A-Z]*SomeSequence2' For some reason * works rather than + for 1 or many match in this grep regex match command. 3. Using the grep Command In Linux-based operating systems, the grep utility is used for pattern matching within data streams or text files. What's reputation and how do I get it? Instead, you can save this post to reference later. 15-5 > 2. A normal regular expression is: "window_indicator&qu Apr 28, 2024 · In Bash, a substring is a part of a string derived or extracted from the string. zip using sed? I want to extract 8-78642. Most characters are ordinary: they stand for themselves in a pattern, and match the corresponding characters in the subject. To gain full voting privileges, I have many lines like the following being returned from a bash command, with different sourceNodeIds of varying digit lengths: I'd like to pipe it to sed or awk and just return the number nnnn from sourceNodeId="nnnn" something like: but this isn't working. The other answers (so far) print the input line if there is no match. I want to extract some specific numbers from them. As an example: grep corner_lat EQA. perl is very good at this sort of thing. Suppose I have a file like this: adasfddfd09 dsassd90897 323sdsdsdsd sdddsdf56 dfdf45fdfdf I want to search only those strings which have last two characters numeric with sed, grep and awk. Using `sed` Overview of `sed` Command `sed`, or stream editor, is a tool used for parsing and transforming text in a pipeline. One common task is extracting numbers from a string. How do I find the text between the strings FOO and BAR inclusive using sed command line option? A. I got a text file like the following: Business Name,Description,Ad Apr 4, 2018 · Since you mentioned sed, you can do this with a sed script too: /^x*Ax*Bx*$/{ # If an index line is matched, then N # append the next (content) line into the pattern buffer :a # label a s/^x(. If a line doesn't contain a matching version string, then nothing is printed. Here's how you would do it: sed 's|. Oct 2, 2018 · If the format of all lines in the file is the same, you can use awk or cut instead of sed to extract only the second colum. 15 release-2. So I'd like to I want to read one part of one line from a file. P. */\1\2\3/p' file Using the -n flag and …/p only version strings of matching lines with a version number are printed. By the end, you’ll have a Swiss Army knife of substring extraction techniques at your disposal to wrangle and transform text like a pro. Introduction to the Problem May 2, 2024 · Learn how to use Linux awk substr function, covering syntax, substring extraction by length and from the end, and nested substr usage. Instead of extracting digits, just delete non-digits: echo hgdfjg678gfdg kjg45nn | sed 's/[^0-9]//g' or even echo hgdfjg678gfdg kjg45nn | tr -d -c 0-9 Jan 23, 2024 · In this tutorial, we’ll learn about the methods to extract floating-point numbers from a string in the shell using the grep, tr, awk, sed, and pcregrep commands, as well as parameter expansion. 2. stackexchange. 4. b. The command string must include the substitute command ‘s’, the original string, and the replacement string. Using sed for Line Extraction `sed` (stream editor) is a utility for parsing and transforming text. May 7, 2020 · input1 = abc-def-ghi-jkl input2 = mno-pqr-stu-vwy I want extract the first word between "-" for the fisrt string I want to get: def if the input is the second string, I want to get: pqr I want to use the command SED, Could you help me please? Suppose I have a file like this: adasfddfd09 dsassd90897 323sdsdsdsd sdddsdf56 dfdf45fdfdf I want to search only those strings which have last two characters numeric with sed, grep and awk. 13 Is there a good way to easily extract those 3 numbers using something like sed or awk such that I could increment the {revision} number and output the full version number string. In particular I want to search the files for the first occurrence of string1 and Sep 12, 2011 · The problem is that the . unix. *)x(\n. 73 The system I'm doing this on runs an embedded Unix variant (QNX) and does not support -o as an option to grep. # grep '[0-9]\{10\}' test. I want to extract only the ip number from that string, so i think that sed should be the best option? (Actually, im not expert with unix, so, any advice is welcome :)) That Jul 19, 2022 · I have a file in which some lines contain a json object on a single line, and I want to extract the value of the window_indicator property. Learn the sed command in Unix with detailed explanations and 25+ examples. Mar 13, 2013 · I have a text file containing both text and numbers, I want to use grep to extract only the numbers I need for example, given a file as follow: miss rate 0. I want to extract the number that follows the alphabets and the zeroes. 2. abc. Jun 4, 2025 · Extracting a substring from a string is a fundamental and common operation of text processing in Linux. Apr 26, 2025 · To replace strings in a file using the sed command, use the -i argument to make the changes in-place. The closest I've come is to concatenate a 1 to the end (which works well enough) because the main point is to simply change the value. log | tr -dc '0-9' In Bash but I want to keep the decimals but this script will only keep numbers and no decimals Mar 18, 2024 · Learn how to extract a given number of a characters from the end of a string via shell tools in Linux. e", "a. Currently I am using the following: echo "2. But using awk is much clearer and easier to understand -- and change if needed. In this tutorial, we’ll examine various ways to extract substrings using the Linux command line. It’ll be used in the examples below, to print text between strings with patterns. Jul 21, 2022 · As Kamil Maciorowski noted, it's theoretically faster to do the processing inside the shell. Jun 16, 2010 · Parse string with bash and extract number Asked 15 years, 5 months ago Modified 15 years, 5 months ago Viewed 43k times This solution captures characters between parenthesis regardless of any characters that follow the closing parentheses and ignores lines that have no parentheses. csv 0987654321,Raka,Nr Man Informatics,Bm ,Bangalore,,26 - 12 - 2010 Rajesh Patel,No 9999 Part Road Town Airlines Bangalore Cell-9702977479,Crv,Bangalore,560051,19 - 7 - 2013 What I need to do is to "extract" that digit to the beginning of the line. zip from the following string - fooBar-5. zpatgh jexr gywc foih zpkzm bmjtp gvnoqs abcvz ijlwtw hbnlxmof cdxlx ond vpgtwn pzlbsv etcy