I’m trying to search a file “Sessions” that contains IP addresses (among other useless junk). My Grep is failing to match, even though REGEXR is matching perfectly all the IPs perfectly … so I know the REGEX is correct … but when I GREP for this same pattern, not is returned. I&#…
Tag: regex
SED one liner to uncomment and replace first occurrence of a pattern
I have this settings.conf file in linux defined as follows: I would like to uncomment # second-setting = off of Section A only (first occurrence), and set the value to on. So far, I have this: cat settings.conf | sed ‘/^# second.*/ {s/^#//;s/off/on/}’ Any tips? Answer Is this what you had in mind?…
nginx rewrite rule for two php parameters
Can you please help me to write rewrite rule for ngnix : I tried below rewrite URL but it is not working: Answer The regex you’re actually looking for is: https://regex101.com/r/uC1wH6/3 I believe that should be converted into Apache as follows:
how to change a part in multiple filenames from 1 to 01?
I have lots of files in a directory. Example: here 9 represent the hour and change from 1 to 24,the date also change. the hours are represented .1. .2. .3. .4. …. .9. I want to replace this part(only this part) in the file name with .01. .02. .03. .04. …. .09. and do not touch any other number in
linux rename multiple files using rename
I have a bunch of files (several thousand) called: output.temp.1.csv output.temp.2.csv output.temp.3.csv etc. I would like them all to be renamed but having the .temp removed output.1.csv output.2.csv output.3.csv etc. I think rename is what i need but not sure how to go about doing it I tried: rename ‘…
.htaccess RewriteRule keeping URL structure
My current rewrite rule: The result above works great so I can format the URL like domain.com/a/b/c I would like to add in a domain switch as well so the results I want is sub.domain.com/a/b/c when you access it using domain.com/a/b/c Currently here is what I have tried But the result of this is http://sub.do…
How to grep a particular pattern
I am trying to get a particular pattern, but i get the result for all possible solutions I did try all the solutions available here How do I get only the PID: 467? Answer If your goal is to grep only for “lubuntu”, not “lubuntu-somethingelse”, then you can add a space afterwards: Or wi…
Regext to match only ONE occurance of a pattern
How to write a regex that says that given pattern is present ONLY once? for e.g.. if am searching for pattern ‘file’, Answer You could use a negative lookahead: Test at regex101 You may apply the above regex in grep. The negative lookahead assertion at ^ start (?!(?:.*?file){2}) looks ahead, if th…
grep first n rows, return file name only
I can do the following to search for what I need and return the file name: grep -l “mysearchstring” ./*.xml However the files I am searching are huge so this takes forever. The string I am searching will appear in the first 200 rows so how can I search only the first 200 rows and still return the …
How to use awk regex sort by query string value?
I have a log file with example row: The 7th column of each row looks like this: Output is arranged according to the number of lines in decreasing order containing unique values of t. Desired OUTPUT: I am using awk but it is not giving desired output: It outputs all columns after 7th which is not required. Wha…