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Replace nth line using sed

$ grep -rl oldstring . |xargs sed -i -e 's/oldstring/newstring/' - (recursive search and replace old with new string, inside files recursively traverse the directory structure from . down, look for string \"oldstring\" in all files, and replace it with \"newstring\", wherever found also: $ grep -rl oldstring . |xargs perl -pi~ -e 's/oldstring/newstring'). Nov 14, 2020 · With sed, you can search, find and replace, insert, and delete words and lines. It supports basic and extended regular expressions that allow you to match complex patterns. In this article, we’ll talk about how to find and replace strings with sed. We’ll also show you how to perform a recursive search and replace. Find and Replace String ... ziconeradio.be Sep 14, 2019 · Here N denotes Nth line in a file and d denotes delete a line. The below sed command removes the first line in sed-demo.txt file. # sed '1d' sed-demo.txt After deletion: 2 Unix Operating System 3 RHEL 4 Red Hat 5 Fedora 6 Arch Linux 7 CentOS 8 Debian 9 Ubuntu 10 openSUSE Replace nth position character of all the lines in file I want to replace 150th character of all the lines in a file using sed or awk... searched the forums but didn't find exact answer greenworld123 * Processor / memory bandwidthd? in GB/s >> dd if=/dev/zero of=/dev/null bs=1M count=32768 * Print all the lines between 10 and 20 of a file >> sed -n '10,20p' * Attach screen over ssh >> ssh -t remote_host screen -r * To print a specific line from a file >> sed -n 5p * Search commandlinefu.com from the command line using the API >> cmdfu ... The s command (as in substitute) is probably the most important in sed and has a lot of different options. The syntax of the s command is ‘ s/ regexp / replacement / flags ’. Its basic concept is simple: the s command attempts to match the pattern space against the supplied regular expression regexp ; if the match is successful, then that ... To replace only the first instance of a word in a sentence the command looks like this. sed -i 's/original_word/new_word/' file.txt. Or you can use the Replace button in Gedit which somehow I managed to overlook while trying to figure out a command to do this!sed -e '/John/,/Elisabeth/s/like/love/' test1.txt. Our prefered fruits: I like apples. John loves pears. Elisabeth also loves pears. Yes, the syntax is /from/,/to/s/search/replace/arg! Grep'ing. Often, you only want to print the lines where you have (searched and) replaced text: sed -n -e 's/like/love/p' test1.txt. I love apples. John loves pears. Sed works as follows: it reads from the standard input, one line at a time. for each line, it executes a series of editing commands, then the line is written to STDOUT. An example which shows how it works : we use the s sommand. s means "substitute" or search and replace. The format is The sed stream editor is a non-interactive line editor that can perform powerful editing operations on text streams or files. Learning to use sed well will allow you to To make sed replace every instance of on instead of just the first on each line, you must pass an optional flag to the substitute command.Two issues 1) in sed, "However, if you are inserting a new line, don't use " " - instead insert a literal new line character" (see: http Backslash escape sequences, if present, are decoded as follows: a alert (bell) backspace e an escape character form feed new line carriage return horizontal tab v...sed -i 's/First \(.*\)/First "New string to be added"/' testFile edited Jul 3 '13 at 10:41 answered Jul 3 '13 at 10:36 Lev Levitsky 35.4k 9 77 114 The string "This line is to be deleted" may vary according to my app. – Mann Jul 3 '13 at 10:38 @Mann So you just want to replace everything after First?

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Hi, I am converting a .csv file into an HTML file, all looks good apart from one little problem. I need to make some sed inserts ( well I think sed will do it ), For every occurance of the word 'CLAIMS', within that line there is an amount figure. I need to make that number bold as well, so I need to insert a <B>, before the number. Arbitration Basics Bootloader BootProcess Commands Cross-Compile DaVinci Debugging Device Drivers DM6467 filesystem Fundamentals GIT I2C Kernel Linux Protocol Ralink SD sed SPI ssh U-boot USB USB3.0 Blog at WordPress.com . Aug 29, 2011 · Recently, somebody asked whether it's possible to replace Nth delimited item, delimiter set as pipe symbol. Suppose, the text contains; TXT="abc|def|ghi|jlk|mnop|qrst|uvw|xyz|123|456|7890" Now, if you look at the text, 4th delimited item is out-of-order, i.e jlk. So, if I want to correct it to jkl, (i.e. N = 4) I tried solving this using sed and… Apr 13, 2019 · Replacing from nth occurrence to all occurrences in a line : Use the combination of /1, /2 etc and /g to replace all the patterns from the nth occurrence of a pattern in a line. The following sed command replaces the third, fourth, fifth… “unix” word with “linux” word in a line. I have a very simple text file here with the following contents line1 line2 line3 line4 I want to modify the contents via sed(or some other app) so it becomes line1 line2 #this line was added by sed line3 line4 So I tried sed -e "s/line2/line2\\\ #this... This will replace every occurrence of shoes with shirt in sed_demo.txt file. You can also combine /1, /2 etc with /g to replace all the patterns from the nth occurrence of a pattern in a line. The following sed command replaces the second onward occurrence of “shoes” word with “Shirt” word in a line. (2) If you cannot use GNU sed and if you know the pattern will not occur on the first line, this will work: sed '1,/RE/{//d;}' file # delete only the first match sed '1,/RE/s//to_that/' file # change only the first match (3) If you cannot use GNU sed and the pattern might occur on the first line, use one of the following commands (credit for ...