Looping CLI commands for X iterations in BASH 1

[czarj]

All-

I have a quick BASH scripting questions. Lets say I want to run the following commands X number of times:

ls -la /test
stat /test/file.test
whois bob
cat /test/file.test >> /tmp/testme
ect

How can I loop this is a BASH shell?


--- You must not fight too often with one enemy, or you will teach him all your tricks of war.

 

[Annihilannic]

bash supports a C-like for loop construct:

for (( i=1; i<=10; i++ ))
do
    ls -la /test
    stat /test/file.test
    whois bob
    cat /test/file.test >> /tmp/testme
done

Annihilannic.

 

[czarj]

I get syntax errors:

bash-2.04$ more loop
#!/bin/bash
for (( i=1; i<=10; i++ ))
do
ls -la /test
stat /test/file.test
whois bob
cat /test/file.test >> /tmp/testme
done



bash-2.04$ ./loop
./loop: line 2: syntax error near unexpected token `(('
./loop: line 2: `for (( i=1; i<=10; i++ ))'


--- You must not fight too often with one enemy, or you will teach him all your tricks of war.

 

[Annihilannic]

Ah, it's a relatively new feature of bash I believe, perhaps v3 and higher.

Try this instead:

#!/bin/bash
i=1
while (( i<=10 ))
do
    ls -la /test
    stat /test/file.test
    whois bob
    cat /test/file.test >> /tmp/testme
    (( i=i+1 ))
done

Annihilannic.

 

[czarj]

That works, thanks!

--- You must not fight too often with one enemy, or you will teach him all your tricks of war.

 

[feherke]

Hi

Ah, it's a relatively new feature of bash I believe, perhaps v3 and higher.

Not so new. My [tt]bash[/tt] 2.05b.0 ( released in 2002, AFAIK ) knows it.

Feherke.

http://rootshell.be/~feherke/