mjhjmtu

I have a file with IP and port numbers. I would like to take out the port number and leave the IP alone.

xyz 10.93.10.13:58160).
xyz 10.93.10.13:58161).
xyz 10.18.104.181:12466).
xyz 10.93.10.13:60585).
wxy 10.93.10.13:60586).
wxy 10.93.10.13:60587).
ADMIN loopback[127.0.0.1]:33955).
ADMIN loopback[127.0.0.1]:33957).
ADMIN loopback[127.0.0.1]:33961).
ADMIN loopback[127.0.0.1]:33962).

expected output

xyz 10.93.10.13
xyz 10.93.10.13
xyz 10.18.104.181
xyz 10.93.10.13
wxy 10.93.10.13
wxy 10.93.10.13
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]

i tried a lame procedure which won't work

cat 1.txt|grep -v [:12312]

thanks

First, useless use of cat. Secondly, grep only searches; it does not change anything. You want sed here:

$ sed -E 's/:[0-9]+.*/ /' input
xyz 10.93.10.13
xyz 10.93.10.13
xyz 10.18.104.181
xyz 10.93.10.13
wxy 10.93.10.13
wxy 10.93.10.13
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]
ADMIN loopback[127.0.0.1]

sed 's/(.*):.*/1/' filename should do the trick. Match everything before the colon and return that in the substitution.