All Questions
25 questions
-2
votes
4
answers
205
views
Getting output of /usr/bin/time in CSV format
I am using gawk to parse the output of macos' /usr/bin/time into CSV format as shown below. The problem is that gawk is returning the 'involuntary context switches' value for 'voluntary context ...
- 13
0
votes
1
answer
150
views
AWK: regex is not processed when passed as a variable
Any suggestions? I read: Escape Sequences (The GNU Awk User’s Guide)
Representative Example
$ Filesystem='/dev/mapper/vgubuntu-Media'
$ FilesystemRegex="$(echo "${Filesystem}" | sed &...
- 2,146
2
votes
4
answers
396
views
linux + delete by bash script the unused/incorrect UUID number/s from fstab file
our goal is to create bash script that delete the unused / unnecessary UUID number/s from /etc/fstab file ,
brief background - in our labs , we have more then 500 RHEL servers , and we want to fix the ...
- 13.9k
-1
votes
3
answers
584
views
How to match end of last string in file which does not end with punctuation
I'm trying to search a directory for files which do not end in a period. I'm trying to list the file name with the final ascii character which is not followed by period/ punctuation. I've looked all ...
- 19
2
votes
3
answers
155
views
Replacing math equations by result
What is the best way to replace, in a file, equations found using some predefined regex with the result.
Let's say each equation formula is compatible with bc -l (basic calculator with float numbers ...
- 23
6
votes
8
answers
4k
views
Use awk to delete everything after the ","
I have a variable, var, that contains:
XXXX YY ZZZZZ\n
aaa,bbb,ccc
All I want is aaa in the second line.
I tried:
out=$(echo "$var" | awk 'NR==2{sub(",.*","")}' )
but I ...
- 147
0
votes
1
answer
904
views
How to use BASH variable for AWK filtering results
I have this script, I'm getting first letter of my directory name, and I wan't to get directory names that start with the same letter and write to textfile. The for loop is looping list of directory ...
- 235
1
vote
3
answers
199
views
How to use a file of search patterns to search for exact words in the final column of a csv?
This issue is covered as separate topics, but I can't get everything to work together.
I have a tsv file, here is an example line: (file1)
NODE_1_length_45927_cov_22.029055_g0_i0 WP_055195622.1 93.1 ...
- 13
0
votes
2
answers
451
views
Append text to flagged output of awk
I have a function that takes a filename. It then runs a command and filters the output (exclusive) between two patterns, then it outputs comma separated values with the filename output of the command. ...
- 211
-1
votes
1
answer
164
views
Match system path with awk in if statement
I am trying to catch if the file system was mounted on a directory tree with:
mount | awk '{ if ( $3 == /mnt/pxe ) print mounted }'
But the string is not catched even though mount exists. The mount ...
- 263
2
votes
3
answers
2k
views
Using regular expression to get latest pip package version
I'm trying to parse the output of this pip install to get the latest package version.
pip install package==
ERROR: Could not find a version that satisfies the requirement package== (from ...
- 23
0
votes
2
answers
2k
views
And operation and case insensitivity in awk regular expression?
I'm trying to match filenames that contain two text patterns but the matching process should ignore case. Neither of the following regular expressions work:
Setting the awk variable 'IGNORECASE' to a ...
- 1,166
0
votes
2
answers
165
views
bash + regular expression + capture java version [closed]
how to capture the jdk1.8.0_112 under /usr/jdk64
/usr/jdk64/jdk1.8.0_112/
while jdk1.8.0_112 is example
and could be any other version as
jdk1.7.0_112
jdk3.8.2_112
jdk1.8.0_117
jdk1.2.0_112
jdk2.7....
- 13.9k
0
votes
2
answers
145
views
Changing two strings on same line matched by a regex
I have a number of variables in a .dat file that I automatically changed with a script. One of these files has a parameter, bar, that is arranged as such in a .dat file:
var1 var2 var3 foo bar
T ...
-2
votes
1
answer
61
views
replace name after specific syntax
We have Bash script. We want to change the name - master02 with $machine_master in the Bash script.
value=master02_up
#master02
http://master02.$domain:8080
How to change master02 to $...
- 13.9k