All Questions
66 questions
0
votes
2
answers
44
views
Capture and print on the exact match from a file
I am trying to use grep to match only a specific part of a row in a file.
The file is a huge csv file with some columns containing json with commas so it is hard to figure out which column what I am ...
- 161
-2
votes
3
answers
231
views
Bash script: echo output of variable and write to file
I am trying to write a script which will check to see if the contents of a file match a certain value and if so, overwrite it with contents of another file.
Example:
file1 =
A, B, C, D
1, 2, 3, 4
...
8
votes
5
answers
2k
views
How to execute a command on all files whose names match a pattern and whose contents match a pattern?
Say I want execute cmd on all *.cpp and *.hpp files that contain the word FOO.
As far as just finding those files goes, I know I can do,
find /path/to/dir -name '*.[hc]pp' -exec grep -l 'FOO' {} +
...
- 2,179
2
votes
2
answers
334
views
Why does awk concatenate strings from different lines
Good day.
I'm trying to run a ping6 on IPv6 addresses pulled from /etc/resolv.conf.dnsph. It seems though, as if awk is stringing the IPv6 addresses onto one line.
$ grep ^nameserver /etc/resolv.conf....
- 31
1
vote
1
answer
1k
views
Grep from bash return No such file or directory but work if the same command executed manually from CLI
If i execute below bash script named test.sh, I receive this error:
./test.sh: line 8: grep -irl -e"1234567891" ./save: No such file or directory
If I execute the line above taken from ...
- 121
0
votes
2
answers
113
views
Writing a regular expression to list IPv4 addresses found in a docker network
Hello while inspecting the characteristics of a docker network with the command docker network inspect network59 , I noticed the precence of ipv4 address and I would like to write a regular expression ...
- 15
0
votes
1
answer
309
views
grep data between two timestamps
I am so beginner with linux .
Oct 07 11:00:33 some text
Oct 07 12:00:33 some text
Oct 08 14:00:33 some text
Oct 08 21:00:33 some text
Oct 09 21:00:33 some text
I would like ...
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
4
answers
528
views
Changing the name of a file based on a part of its original name that are between the first two instances of a character
I am trying to change the names of my files based on the string between the first two instances of "|". This is what my problem looks like:
>1234|interest1|randomstuff1.txt
>5678|...
- 3
0
votes
1
answer
209
views
I'm trying to understand how to shorten regex
I'm trying to list all directories that are 1GB or larger. I know I could use ncdu, but at the moment, I'm just trying to understand how to shorten regex...
I found this command, du -h . | grep '[0-9\....
- 15
13
votes
2
answers
36k
views
How to grep multiple strings when using with another command?
I am trying to find out how I can use:
grep -i
With multiple strings, after using grep on another command. For example:
last | grep -i abc
last | grep -i uyx
I wish the combine the above into one ...
- 233
6
votes
1
answer
14k
views
Grep a list of strings [closed]
I have a multiple strings that I want to find them in a list of files that are in a same folder. So, I want to put all the strings in a sort of list and then apply the command: grep -l string *,so I ...
0
votes
1
answer
2k
views
Finding a string in multiple folders that are in the same directory
I have a directory A that has multiple folders, and I want to find a string in those folders. How can I do it?
I have tried grep -rw string * in A, but it takes a lot of time.
1
vote
2
answers
2k
views
How to programmatically maintain umask in /etc/profile and /etc/bashrc
I am looking for a way to programmatically maintain a consistent umask in the files /etc/profile and /etc/bashrc. They have an entry such as follows:
if [ $UID -gt 199 ] && [ "`/usr/bin/...
- 11
1
vote
2
answers
627
views
grep not working with filename from for loop
learning bash scripting and i'm trying to filter results with a nested grep in a for loop:
sample filenames:
this-file_AAC.txt
this-other_file_AAAC.txt
yep-a-file_AAC.nfo
oops_another_one....
- 255