Find a name in a file...


 
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# 8  
Old 08-23-2006
That is a virtual file that can be written to. It will print the output onto your screen. The data written to this file gets discarded.
# 9  
Old 08-23-2006
It used to fool grep into listing the filename where a match occurs, instead of just the matching line. However you will never get a match from /dev/null

try:

Code:
grep `hostname` /etc/hosts

then
Code:
grep `hostname` /etc/hosts /dev/null

And you'll see what I mean.
# 10  
Old 08-24-2006
Oh I see now, useful to know thanks.
# 11  
Old 08-24-2006
Hi Reborg,
i too tried ur commands but can you just tell me why we need that single quote .. it has not worked without those..

-Chanakya
# 12  
Old 08-24-2006
with the command `hostname` you are searching for the output of the command hostname in the /etc/hosts and /dev/null...

note the back tilts - command executed and the output is used

say if the node name is unixcom
much similiar to searching like

>hostname
unixcom

>grep unixcom /etc/hosts /dev/null
# 13  
Old 08-24-2006
Thanks Madan now i got it..
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