topic Re: Remove command in Operating System - HP-UX

Remove command

ivy1234 — Tue, 15 Feb 2011 08:45:44 GMT

I have a large file , the file have many lines , the content is as below , each line MAY be begins or ended with # sign .

#abc
#uid#
yti
#des
#fus
eue#
fds

Can advise if I want to check each line , if it begins or ends with # sign then remove this # sign , if not # , then do nothing ( also , if the # sign is in the middle of the line , then do nothing ) , only remove it if it is begin or end character , can advise what can i do ?

the file above should be changed to

abc
uid
yti
des
fus
eue
fds

Re: Remove command

Hemmetter — Tue, 15 Feb 2011 09:22:33 GMT

Hi

you want to replace either linestart "^" followed by hash mark or hashmark followed by
line-end "$" with "nothing" .

That is by "sed":
# sed "s/^#// ; s/#$//" file > newfile

or by "perl":

#
perl -i -pe "s/^#// ; s/#$//" file

here replace the file "inplace" (-i)

see regexp(5), sed(1), perl(1)

rgds
HGH

Re: Remove command

ivy1234 — Tue, 15 Feb 2011 09:39:56 GMT

Thx , it works,

if it is not # sign , do the same thing for " sign , how to do it ? thx

Re: Remove command

Hemmetter — Tue, 15 Feb 2011 10:43:41 GMT

hi again,

it is as easy as either:
# sed 's/^"// ; s/"$//' f
or mask the special char " by \"
# sed 's/^"// ; s/"$//' f

rgds
HGH

Re: Remove command

ivy1234 — Wed, 16 Feb 2011 07:34:43 GMT

it works , thanks much for help

Re: Remove command

Hemmetter — Mon, 19 Sep 2011 17:04:37 GMT

Hi,

You have assigned points to 6 of 93 responses.

If answers you got were helful, you may want donate some points, they cost you nothing.

http://h30499.www3.hp.com/t5/help/faqpage/faq-category-id/kudos#kudos

rgds
HGH

Re: Remove command

V. Nyga — Mon, 19 Sep 2011 17:05:26 GMT

Hi HGH,

maybe you can visit this thread?
http://h30499.www3.hp.com/t5/General/Congrats-to-a-new-wiz-Hemmetter/m-p/4606244#M144980

:-)
V.