Deleting a certain line from a file 2

[TSch]

Hi folks,

is it possible to delete a certain line from a file ?

e.G. file containing IP-Adresses:

192.168.2.1 machine1
192.168.2.7 machine2
192.168.3.11 machine3
192.168.3.12 machine4
192.168.7.8 machine5

Now let's say I'd like to delete the following entry without removing the other ones as well:

192.168.3.11 machine3

How can this be done ?

Regards
Thomas

 

[feherke]

Hi

Now let's say I'd like to delete the following entry without removing the other ones as well

You mean
[ul]
[li]line number 3[/li]
[li]line containing IP address 192.168.3.11[/li]
[li]line containing the IP address of machine3[/li]
[li]line containing the string "192.168.3.11 machine3"[/li]
[/ul]


Feherke.

http://free.rootshell.be/~feherke/

 

[p5wizard]

Are you deleting a host from the hosts file?

If you're on AIX use the command [tt]hostent -d IP-Address[/tt]

See man page for hostent

If you want a cross-OS solution, I'm sure Feherke will come up with something.

HTH,

p5wizard

 

[Annihilannic]

Here's one way:

cp -p /tmp/file /tmp/file.orig &&
egrep -vx '192.168.3.11[[:space:]]+machine3' /tmp/file.orig > /tmp/file

It keeps a backup of the original file, and removes any lines containing only that IP address and machine name, with any number of spaces or tabs in between them.

Annihilannic.

 

[TSch]

Sorry for the late respone.
That's exactly what I was looking for.

Thanks a lot !