Tag: regex

Replace every occurrence of the regular expression matching with a particular in VI editor?

suppose I have a text file as follows. I need to obtain that text file as follows by replacing every table owner name occurrences replace witha same name called “informix”. out put should be like in vi editor , :%s/”kevin”/”informix”/g I can replace them individually but I …

Bash Scripting – REGEX to dump a file list

bash find linux regex

I have 4 files extensions as result of previous works, stored in the $SEARCH array, as follows : I want to issue one file list for each of the 4 above extension patterns, as follows, except for the case with 2 dots and 2 extensions (marked “NO”) : Obviously I spent hours on regex101 w/o success. I…

How to find only the lines that contain two consecutive vowels

linux regex

how to find lines that contain consecutive vowels $ (filename) | sed ‘/[a*e*i*o*u]/!d’ Answer To find lines that contain consecutive vowels you should consider using Here, [aeiou]{2,} pattern matches 2 or more occurrences ({2,} is an interval quantifier with the minimum occurrence number set to 2)…

Unable to get the output using regex

bash linux regex

This might be a silly one, but I’m unable to get the required output. I’ve a file named Abc_sfgf_kjwefgk.txt20180929_040845 in a directory. I’m trying to list the file using the command: ls -l Abc_sfgf_kjwefgk.txt[0-9]{8}_[0-9]{4} But it’s giving me error: ls: cannot access ‘Abc_…

Trouble writing bash sed command – regex match

bash linux macos regex sed

I have a file full of garbage collection information that is irregular, some lines have extra information that I want to initially remove so I can then process the the file as a whole. Unfortunately the line has quite a few special characters and I am struggling with a sed command that manages to match the bi…

multi pattern in sed -n

awk bash linux regex sed

I know there are quite a few questions asked on this topic. But I need help in a case basis.When i try to put more than 3 pattern in the option, i will get the error like that… i only want to print the words in the brackets.. here is the sed command and the output… thanks… sample output Answ…

dynamic string search in shell script

bash linux regex shell

I have a string in shell script which is I need to find DS_BLS_max(sequence number).dat here DS_BLS_max(sequence number).dat=DS_BLS_739.dat Answer Output: DS_BLS_739.dat See: The Stack Overflow Regular Expressions FAQ

Rename part of filename using regex

bash linux regex rename

I have a bunch of files where there is additional information in square brackets. I would like to rename them by removing that section. For example: Want to rename to: I tried playing with regex (and using the rename command) but without success. Does anybody know a way to have the rename command strip of onl…

Using sed (or any other tool) to remove the quotes in a json file

bash linux regex sed

I have a json file I want to change it to i.e. convert the requestId from String to Integer. I have tried some ways, but none seem to work : Could someone help me out please? Answer Try or The main differences with your attempts are: Your regular expressions were looking for [0-9] between double quotes, and t…

linux find files with optional character in their name

find linux regex

suppose I have two files: ac and abc. I want to find a regex to match both files. Normally I would expect the following regex to work, but it never does: I have tried escaping or not the questionmark, this never seems to work. Normally in the regex documentations I have found; ? means: previous character repe…