Here are my commands for a task.
find -name myname.tar
tar -xvf myname.tar
rm -r myname/*
These multi line commands are working fine, but I need a one line command. Then I used this command,
find -name myname.tar | tar -xvf myname.tar | rm -r myname/*
I get this error:
"rm -r myname/*
rm: cannot remove `myname/*': No such file or directory "
can some one help me in this?
Thanks
Most possibly you are looking for a way to execute the next command, if the previous one ran without an error.
&& operator checks the exit status and moves on, if it is 0 (for OK)So what you seem to want is
find -name myname.tar && tar -xvf myname.tar && rm -r myname/*
& at the end of the command. If I place && after I get -bash: syntax error near unexpected token &&'`.There are two common ways to do this:
Join the commands together with a semicolon ; which will run the commands one after the other.
echo "Hello"; false; echo "There";
>> Hello
>> There
The other is join commands with a &&
The && will ONLY do the next command if the one before it had a zero exit code.
echo "Hello" && false && echo "There";
>> Hello
The '|' symbol does something different entirely. It runs the two commands, feeling the standard out stdout of the one into the standard in stdin of the other. (wc -w counts the number of words in stdin.)
echo "Two Words" | wc -w
>> 2
What you were using (|) is called a peer, which passes data from one command to another. for ex.:
$ cat test.php | grep '<'
<?php
to run several commands one after another you can use ';':
echo 123; echo 456
or if you want your commands to depend on each others success, you can '&&':
$ eho 123; echo 456
eho: command not found
456
$ eho 123 && echo 456
eho: command not found
