#!/bin/bash
cmd="nohup mycommand";
other_cmd="nohup othercommand";

"$cmd &";
"$othercmd &";

$cmd &
$othercmd &

nicholas@nick-win7 /tmp
$ cat test
#!/bin/bash

cmd="ls -la"

$cmd &


nicholas@nick-win7 /tmp
$ ./test

nicholas@nick-win7 /tmp
$ total 6
drwxrwxrwt+ 1 nicholas root    0 2010-09-10 20:44 .
drwxr-xr-x+ 1 nicholas root 4096 2010-09-10 14:40 ..
-rwxrwxrwx  1 nicholas None   35 2010-09-10 20:44 test
-rwxr-xr-x  1 nicholas None   41 2010-09-10 20:43 test~

cmd="google-chrome"
"${cmd}" &>/dev/null &disown

cmd="google-chrome"
eval "${cmd}" &>/dev/null &disown

#!/bin/bash

# Run a command in the background.
_evalBg() {
    eval "$@" &>/dev/null &disown;
}

cmd="google-chrome";
_evalBg "${cmd}";

filename="filename"
extension="txt"
for i in {1..20}; do
    eval "filename${i}=${filename}${i}.${extension}"
    touch filename${i}
    echo "this rox" > filename${i}
done

./run.sh  &>/dev/null &