All Questions
1,960
questions
2
votes
2
answers
73
views
Regex using Bash metacharacters in double bracket `[[…]]` command using `=~` operator
The Bash reference manual, in sec. 3.2.5.2 Conditional Constructs, says
It is sometimes difficult to specify a regular expression properly without using quotes, or to keep track of the quoting used ...
- 427
5
votes
7
answers
264
views
gawk hangs when using a regex for RS combined with reading a continuous stream from stdin
I'm streaming data using netcat and piping the output to gawk. Here is an example byte sequence that gawk will receive:
=AAAA;=BBBB;;CCCC==DDDD;
The data includes nearly any arbitrary characters, but ...
- 53
-1
votes
0
answers
21
views
Extended Regular Expression for email id in bash [duplicate]
While learning about BRE and ERE, I came across this example
grep -E "[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,6}" emails.txt
emails.txt
[email protected]
[email protected]....
- 21
2
votes
1
answer
73
views
How to use a pattern-list within a longer path name in a cronjob?
Every day I need to move four files from one folder to a subfolder. On May 26th, these are the files from yesterday:
changes-ar-240525.txt
changes-dp-240525.txt
planned-ar-240525.txt
planned-dp-240505....
user24031531
0
votes
0
answers
46
views
Confused about why the regex pattern does not works [duplicate]
I'm using npm ls -a which gives the following ouput:
└─┬ [email protected]
├── [email protected]
└── [email protected]
I'm trying to extract all the dependencies and store it in a file with the following ...
1
vote
3
answers
46
views
grep expression behaving weird (unix/mac) while reading a conf file
What's going wrong in below grep expression, appreciate any help.
$cat foo.txt
## not to be read
; this one too and next one also coz it has sapce
first_var= first_val
second_var=y
second_var=yes
Now ...
- 79
0
votes
0
answers
35
views
How to use sed in shell script with value containing line break \n? [duplicate]
In my shell script I have conf=2bi5oIl0hldy/p3fe+KMQTVjUSg89ywhdMCaSOAopEVFM\nKlj4RDJcmNcEa1cgxL3sJNBHrw==\n
And I have a ini file that has parameter looks like this:
^PASS= SNlfkDahPoWNYCY0V+...
- 1,361
0
votes
2
answers
64
views
How to use awk command to print multiple lines based on the matched and filtering condition
I am trying to filter out the logs which are 7 days older than the newest log, for example, if the last section of log is 2024-02-13 then all the logs on 2024-02-05 would be removed.
The example log ...
- 3
0
votes
1
answer
68
views
How to use quotation marks with bash regex? [closed]
I want to use a regex in my Bash script like the code below:
REGEX='^\s*-.*|^\s*file:\s*["'\''].*'
if [[ ${LINE} =~ ${REGEX}.* ]]; then
# TODO
fi
If I execute this in the script in Windows it ...
- 81
0
votes
3
answers
107
views
Find files matching a regex pattern
How do I find text files (.txt) that starts with the letter "M" in the current directory in bash?
I have tried find -E . -type f -regex '^M[^/]*\.txt$' but it doesn't work.
Using \./'^M[^/]*...
- 23
-1
votes
2
answers
76
views
Extract numbers only part in shell script
I need a help to extract a part of string into a variable with a shell script.
$STR=“ttysggjs364-hhe 1738.98”
I need 1738.98 in to a variable. How can I do this. Hope you guys can help me. Thanks
- 3
5
votes
4
answers
351
views
grep command that matches lines with letters in alphabetical order
I need help figuring out a regular expression with grep that will search a file and display lines that put [a-z] in alphabetical order in each 'set' separately (it will become clear with the examples)
...
- 101
0
votes
1
answer
62
views
grep -E (not working) vs grep -Po (working) [duplicate]
I have shell script for ci cd pipeline. I am executing it in intellij ide terminal.
latestVersionAvailable=$(curl -s $artifactoryPath/maven-metadata.xml | grep -Po '(?<=<version>)'$VERSION'.*?...
- 1,227
0
votes
3
answers
81
views
Finding lines where the occurrence of word happens only after a specific searched word
Consider the below set of lines in a file:
File1.csv
Apple is red WHERE the column ALP_ACCT_PROD_ID, it can be plucked
Apple is red ON ALP_ACCT_PROD_ID , WHERE it can be plucked
I want to look after ...
- 99
1
vote
2
answers
96
views
Is the use of regex here POSIX compliant and is the code used appropriate for the problem described?
Following from my previous question here, please see below a fuller form of my question.
Code use case
The current code is a module for use in polybar, a customisable status bar. As per the first link,...
- 69