[CentOS] Define an alias with an embeded awk command

Majian jiannma at gmail.com
Tue Dec 15 05:20:44 UTC 2009


Thanks for your advice ~
But After  I  edit the command "alias checketh0  "echo `ifconfig eth0 | grep
'inet addr:' |awk '{print $2}' | cut -c 6-`"  in my .cshrc file
The screen displays this :
innet addr:192.168.7.24 Bcast:192.168.7.255 Mask :255.255.255.0

I  just want to the "192.168.7.24"


 Maybe is it the awk command error?

On Tue, Dec 15, 2009 at 12:54 PM, Andrew Harley <andrew at promed.com.au>wrote:

>  On 15/12/09 15:40, Majian wrote:
>
> Hi ,all :
>
> I'm trying to define an alias with an embeded awk command:
>
> alias checketh0  `ifconfig eth0 |grep 'inet addr:' |awk '{prinrt $2}' |cut
> -c 6- `
>
> After  I edit it in the  .cshrc file and run "source .cshrc" , I run the
> "checketh0" command in the terminal ,
> the screen displays the "192.168.7.24: Command not found "
>
>
> Why does is it ?Any help will be highly appreciated.
>
> note: I'm using csh  shell.
>
> Hi Majian,
>
> It's not an issue with awk but with the way the alias is interpreted. It
> tries to run the result of the commands in between the ` ` as a command
> itself. To get around it, try:
>
> # alias checketh0="echo `ifconfig eth0 | grep 'inet addr:' |awk '{print
> $2}' | cut -c 6-`"
>
> Cheers,
>
> Andrew
>
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