All Questions
41 questions
4
votes
4
answers
313
views
BASH - Find file with regex - Non-recursively delete number-only filenames in directory
I'm wanting to non-recursively delete all files in a directory where each filename contains only numbers, using only a single line of BASH.
I somehow accidentally ran a shell script with commented out ...
- 61
3
votes
2
answers
541
views
How do quotes work in bash regex regarding reserved characters?
Is there any special bash reserved characters in bash regex expression?
ex:
eg: if [[ $url =~ ^https:\/\/www\.youtube\.com\/playlist\?(.+&)?list= ]]; then echo "URL matches the regex"; ...
- 133
-1
votes
2
answers
425
views
How to get complex regex to work in bash
The idea is to get a rudimentary check on input pattern for a url:
$ ns='abc.def.com'
$ reg_expr="\N*\.(\D{2}|\D{3})$"
$ echo $reg_expr
\N*\.(\D{2}|\D{3})$
$ [[ $ns =~ "$reg_expr" ]...
- 127
1
vote
2
answers
166
views
sed -Extended RegEx question here
I feel dumb as a sack of hammers asking this here, but it's been a long day and I simply CANNOT figure out what I'm doing wrong here.
I have a file; we'll call it textfile.txt. It's contents are (in ...
- 123
0
votes
1
answer
599
views
regular expression - command not found on terminal
I am trying to grab my_name 369 from file.txt
I input this grep line with regex but it return an error. I have tried using egrep and it did not work.
Input:
my_name 369 == match
my_name 161 == match
...
- 61
0
votes
2
answers
207
views
move recently created files matching a pattern from one folder to a different one
I am looking for a bash script example which does the following:
I have files being written under /tmp folder
I do at the xterm prompt, ls -ltr which gives me a list of recent files such as:
...
- 3
1
vote
4
answers
1k
views
Grep number behind path, tab and space in a string
Given a string s
s="B /home/BL/004_010_0100.0 23 0.031"
How can I grep only the number behind the path, tab and space in a string?
In the string s above, I'd like to extract the ...
- 33
2
votes
1
answer
1k
views
bash conditional expression and backslash escaping [duplicate]
I've really hard time to understand this behaviour:
stackExchange@test:~$ if [[ "two words" =~ \bwords ]]; then echo hi; fi; #(I'd expect this one worked)
stackExchange@test:~$ if [[ "...
- 23
1
vote
0
answers
5k
views
Working regex does not match in bash [duplicate]
i have a CIDR range in this regex
^5\.188\.62\.([1-9]?\d|[12]\d\d)$
I am able to confirm matching values using https://regexr.com
Now i am testing some code and i am using the following as a sample ...
1
vote
1
answer
1k
views
bash script for creating a text file with all files with specific ending
I know this is a bloody beginner question. But maybe someone has a short answer on this one.
In my folder I have several files that end on .SAFE. There are files with different endings though aswell......
- 113
5
votes
3
answers
3k
views
Convert only parts of a filename to uppercase
In a shell script program, I need to convert the filenames to uppercase if the converted filename does not already exist. In this particular case I need to change only the basename to uppercase ...
- 193
2
votes
3
answers
1k
views
Shell script, get/extract mac address from console output of command after "MAC: "
I'm trying to automatically pull out the mac address of a arduino device using a shell script, and need some help how to do this.
This is the output returned by the command:
Opening /dev/cu....
- 2,725
1
vote
2
answers
4k
views
How to negate regex using test
This is syntactically wrong:
#!/usr/bin/env bash
dimension="4x5"
if [[ "$dimension" !=~ '[0-9]x[0-9]' ]]; then
echo 'wtf meng, the dimension needs an "x" in it.'
return 1;
fi
the above has bad ...
- 10.6k
4
votes
2
answers
467
views
Search For Three Consecutive Words
There are duplicates in my booklist (txt file) like the following -
The Ideal Team Player
The Ideal Team Player: How to Recognize and Cultivate The Three Essential Virtues
Ideal Team Player: ...
- 2,978
0
votes
4
answers
1k
views
How to extract the CSV file name from each line of this file
I have a file which contains lines like those:
-rw-rw-rw 1 root root 6379 May 24 2016 test1.CSV
-rw-rw-rw 1 root root 23249 May 25 2016 test2.CSV
-rw-rw-rw 1 root root 2995 May 26 2016 test3.CSV
...
