topic Re: Remove /dev/ from the large file using sed in Operating System - HP-UX

Remove /dev/ from the large file using sed

Mike_305 — Sat, 20 Nov 2010 19:08:08 GMT

Hello,

I am trying to remove /dev/ from the file using sed and no luck getting that done.

If someone can hel me that will be very much appreciated.

at test.lst | sed -e 's/\/dev//' >>> Strill leaves the leading "/" and not able to remove using sed.

trying to remove /dev/ from the file

Regards,

M

Re: Remove /dev/ from the large file using sed

Patrick Wallek — Sat, 20 Nov 2010 19:15:05 GMT

Here is what I started with:

$ cat test.lst
/dev/some
/dev/thing
/dev/some
/dev/thing
/dev/else

Here is what I did:

$ sed -e 's/\/dev\///g' test.lst
some
thing
some
thing
else

If you want to remove '/dev/' from the file you have to include the leading and trailing '/' characters and escape them both with the '\'.

Also note that you don't have to cat the file and pipe it to sed. That wastes a process.

Re: Remove /dev/ from the large file using sed

Steven Schweda — Sat, 20 Nov 2010 19:44:40 GMT

[...] and escape them both [...]

"/" may be less special than you think.

$ echo '/dev/thing' | sed -e 's|/dev/||'
thing

Re: Remove /dev/ from the large file using sed

Patrick Wallek — Sat, 20 Nov 2010 19:59:18 GMT

>>"/" may be less special than you think.

When you don't use the '/' as the delimiter, very true. In Steven's example above note that he used the '|' (pipe) symbol rather than forward slashes in the sed command. The eliminated the need for escaping the slashes in '/dev/'.

Re: Remove /dev/ from the large file using sed

Mike_305 — Sat, 20 Nov 2010 20:09:15 GMT

Thanks, appreciate the quick response and knowledge that you share.

U guys are DE Man !!!!! :)

Regards,

MJ

Re: Remove /dev/ from the large file using sed

Mike_305 — Sun, 21 Nov 2010 01:05:25 GMT

thx