basic cat replace string - Shell Programming and Scripting

prkfriryce · #1 (**permalink**) 02-16-2007

trying to exclude hostnames ending in "s" from a host file:

Code:

# cat hosts
ssef
ssefd
ssefsfff
ssefsfs
# for x in `cat hosts`; do echo "${x/*s}" ;done
ef
efd
fff

#

How can I echo/or not echo only 'ssefsfs' ??

thanks

anbu23 · #2 (**permalink**) 02-16-2007

Code:

 sed -n "/s$/! s/s.*s//p" file

To print lines ending with s

Code:

sed -n "/s$/p" file

To print lines without s at end

Code:

sed -n "/s$/! p" file

prkfriryce · #3 (**permalink**) 02-16-2007

Quote:

Originally Posted by anbu23

Code:

 sed -n "/s$/! s/s.*s//p" file

To print lines ending with s

Code:

sed -n "/s$/p" file

To print lines without s at end

Code:

sed -n "/s$/! p" file

thanks, exactly what i need

matrixmadhan · #4 (**permalink**) 02-18-2007

with awk,

Code:

awk '{ if( substr($0, length, 1) !~ /s/ ) { print } }'  filename

zazzybob · #5 (**permalink**) 02-18-2007

Erm.... grep

Code:

 grep '[^s]$' hosts

Cheers
ZB

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