command works in terminal and not in script

Question

The bellow commands works in terminal and prints value 1

count_XXX=`ll -d /usr/Systems/XXX* 2> /dev/null | grep ^d | wc -l`
echo "$count_XXX"

There is one directory and two softlinks in the directory /usr/Systems with the same name XXX*.

when i keep the same two lines in shell script. It prints value 0

This works fine in unix(both terminal and script) but when i try to run in linux server the issue happens(in script).

do i need to change something for Linux.

Thanks in advance.

Answer 1

Using ll then grep and then wc is bit too much for counting directories and this is also error prone due to possibility of whitespace/newline in directory names.

In BASH use this simple snippet:

shopt -s nullglob
arr=( /usr/Systems/XXX*/ )
echo ${#arr[@]}
2

• / at the end of your glob pattern makes sure it matches only directories.
• shopt -s nullglob to make sure to not to print pattern when glob pattern doesn't match anything