Shell脚本：如何检查多个组是否存在并在回显中显示

Question

This is my current code:

 if [ $(getent group administrators) ]; then
   echo "Group exists"
 else
   echo "Group does not exist"
 fi

My questions are:

• how do I improve it by making it such that I can include more groups to display?

• and display the group eg administrators, appears in the echo like: The group administrators, students exists?

Answer 1

Use && to test multiple conditions.

if [ $(getent group administrators) ] && [ $(getent group students) ]
then
    echo The groups administrators and students exit
else
    echo The groups administrators and students do not both exist
fi