[SOLVED] bash to print words/lines vertically

nitya · 02-20-2013, 02:16 AM

Hi All,
How can I print the below supplementary groups vertically,

Code:

$ id -Gn nitya
Admin apache cvs

The output I am expecting as

Code:

Admin
apache
cvs

Thanks in advance for your kind help.

RaviTezu · 02-20-2013, 02:29 AM

Hi nitya,

Quote:

id -Gn nitya | perl -pi -w -e "s/\ /`echo "\n"`/g"

Probably you can use the above command. However there will be other commands which can do the required work in more easiest way. You can wait for other people comments here if you want.

kooru · 02-20-2013, 02:41 AM

Code:

for i in $(id -Gn nitya) ;do echo $i; done

nitya · 02-20-2013, 02:43 AM

Dear RaviTezu,

Code:

id -Gn nitya | perl -pi -w -e "s/\ /`echo "\n"`/g"

Excellent, The above command worked great, But since I don't know about perl I couldn't understand "perl -pi -w -e "s/\ /`echo "\n"`/g"", if you possible could you please expain the perl arguments.
Thank you very much.

nitya · 02-20-2013, 02:48 AM

Quote:

Originally Posted by kooru

Code:

for i in $(id -Gn nitya) ;do echo $i; done

Dear kooru, Excellent. this is what I was expecting. You both solved my problem.
Once again thank you all.

RaviTezu · 02-20-2013, 06:04 AM

Have a look at perl man page & Here

linosaurusroot · 02-20-2013, 06:19 AM

id -Gn nitya | xargs -n1