shell script read line from file, use it in command

DiGiGoth · 08-30-2008, 11:25 AM

i need a script to read the first line from a text file which contains the ip address of my box, and use it in the command
#ez-ipupdate -a ip.ip.ip.ip

where ip.ip.ip.ip is the ip read from the file.txt

i think should read the lint to a var, and use it in the command ?

can someone write a whole script ?
cuz i'm new to shell scripts

thnx

i tryed.. i did something like this

#!/bin/bash
echo Updating dynamic host
wget -N whatismyip.com/automation/n09230945.asp
autoip='head -n 1 n09230945.asp'
echo $autoip

-
its not done yet , but i already have error
./autoip: command not found

though bash exists in path !!
user@ubuntu7:~$ whereis bash
bash: /bin/bash /etc/bash.bashrc /usr/share/man/man1/bash.1.gz

zaichik · 08-30-2008, 11:49 AM

Try this:

Code:

#!/bin/bash
echo Updating dynamic host
wget -q whatismyip.com/automation/n09230945.asp
autoip=`head -n 1 n09230945.asp`
echo $autoip

Maybe "command not found" is referring to wget; are you sure that is installed?

DiGiGoth · 08-31-2008, 09:31 AM

still the same, u only changed "wget" to quiet by -q !

user@ubuntu7:~$ ./autoip
-bash: ./autoip: Permission denied
user@ubuntu7:~$ sudo ./autoip
sudo: ./autoip: command not found
user@ubuntu7:~$

and yes, wget is installed !