Very simple script

cornish · 10-09-2007, 09:26 AM

I use this command sometimes to quickly display an ip address of a host

host hostname | tail -c 15

Rather than typing this command in each time I thought about creating either an alias or a simple script.
For example the alias would be called gh so all I would need to do is type gh [I]hostname[I]

As simple as this sounds I dont know how to create/pass variables can any one help??

bigrigdriver · 10-09-2007, 09:39 AM

Try adding an entry into your .bashrc, in the alias section. alias gh="host <hostname> | tail -c 15".
After making the entry, give the command 'source .bashrc' to reload .bashrc and make the new alias active.

cornish · 10-09-2007, 09:46 AM

Sorry buddy that didnt work
syntax error near unexpected token '|'

pwc101 · 10-09-2007, 10:04 AM

in your .bashrc:

Code:

gethost() {
   host $1 | tail -c 15
}

Then in your shell

Code:

gethost hostname

will output its IP address.

whk · 10-09-2007, 11:03 AM

Have you tried instead arrow up on the commmand line.
or
Cover 'host | tail -c 15' by holding down the left mouse button and relocate to the command line then press the center (wheel) button.

In a year I would forget what gh is if I don't add a full comment line in the script.