I run the command grep to get certain output and store it into a variable. The output of grep command is:
5.3.1-6.2011171513.ASMOS6
but I need to only parse out 5.3.1-6 and store that version in a variable. How can I do that?
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2 Answers
What about this?
TEXT=5.3.1-6.2011171513.ASMOS6
RES=$(echo $TEXT | cut -d. -f-3)
We cut the string on . and then get the first 3 pieces.
With awk
RES=$(echo $TEXT | awk -F. 'OFS=FS {print $1,$2,$3}')
OFS=FS meaning we get the delimiter to print that was defined with -F.
5 Comments
JumpOffBox
Awesome !! Both of them work great. Thank You! I was using regex (\\d)(\\.)(\\d)(\\.)(\\d)(-)(\\d)
fedorqui
Good to read it worked for you, @JumpOffBox! Sometimes either
cut or awk are easier to handle and understand. If you are done, you can mark the question as answered. Cheers!JumpOffBox
Could you also suggest why I was going wrong with above reg ex?
fedorqui
Please indicate the exact command you were using. Were you using
sed with regex (\\d)...?JumpOffBox
Thanks ! Actually, I was looking to use same awk and cut to parse version e.g in string res3=asmos-no-5.3.1-6.2011171513.ASMOS6, but delimiter either gives me 5.3.1 or 1-6 but not complete "5.3.1-6", hence I used reg ex $(echo $res3| sed -e 's/.*[0-9]\.[0.9]\.[0-9]\-[0-9].*/g') which was not working even cut or awk was not working to get 5.3.1-6 in above res3 string> Thanks !
As you tag says linux, I'll assume that you have a modern grep that supports the -o option.
You can do
var=$(grep -o 'regex' file)
To capture just the regex to a variable.
Unfortunately, I don't understand the problem you're having getting just 5.3.1-6, you have to edit your question to show us the regex youare currently using.
IHTH
2 Comments
JumpOffBox
The above said sting is the output I get and store it in a variable. $var = 5.3.1-6.2011171513.ASMOS6 I need stored in another variable $var2, only 5.3.1-6 from string($var) and do not need rest of the characters in the string. The issue is the version can change this time it is 5.3.1-6, next time it could be 7.4.5-2
JumpOffBox
The above said sting is the output I get and store it in a variable. $var = 5.3.1-6.2011171513.ASMOS6 I need stored in another variable $var2, only 5.3.1-6 from string($var) and do not need rest of the characters in the string. The issue is the version can change this time it is 5.3.1-6, next time it could be 7.4.5-2 I use reg ex (\\d)(\\.)(\\d)(\\.)(\\d)(-)(\\d)