topic Re: can someone explain this... in Operating System - Linux

can someone explain this...

Ratzie — Fri, 06 Feb 2004 15:16:28 GMT

Can some one explain this...
IPLIST=/the/correct/path/sw_ip.txt
for IP in $(cat $IPLIST)
do
echo $IP
echo $IP
echo "$IP"
echo $IP ","
echo "$IP ,"
echo "$IP, changed passwd."
echo "$IP changed passwd."
echo $IP", changed passwd."
done

Output:
123.456.20.50
123.456.20.50
123.456.20.50
,3.456.20.50
,3.456.20.50
, changed passwd.
changed passwd.
, changed passwd.

Re: can someone explain this...

Mark Travis — Fri, 06 Feb 2004 15:39:16 GMT

Well first figure out what shell you're using.

Bash maybe?

Then "man bash". Then look for something along the lines of what meaning quotes and $'s have.

They appear to have multiple meanings.

Or maybe make your shell "sh" and it won't have as many features to hang you up like this.

Re: can someone explain this...

Ratzie — Fri, 06 Feb 2004 17:02:51 GMT

needed to dos2ux it!

Re: can someone explain this...

Ragu_1 — Sat, 07 Feb 2004 22:33:06 GMT

Maybe the Sams book on Unix Shell Programming would help you. Do you want to change password upon change of IP ? Are you trying to do something ?

Re: can someone explain this...

Oren Amit — Sun, 08 Feb 2004 04:11:05 GMT

Just tried it on bash 2.05b.0(1)-release with no problem.
Please reply with your shell type & version.

Re: can someone explain this...

Paul Cross_1 — Mon, 09 Feb 2004 12:05:57 GMT

i think he already figured it out...