/ {curly brackets ftw}

scr/3_create_user.sh

@@ -12,7 +12,7 @@ fi
 this_file_name=`basename "$0"`
 
 if [ $# -ne 1 ]; then
-    echo usage: $this_file_name [USERNAME]
+    echo usage: ${this_file_name} [USERNAME]
     exit 1
 fi
 
@@ -21,8 +21,8 @@ username=$1
 # ---
 # create a new non-root user
 # ---
-adduser --disabled-password --gecos "" $username
-mkdir /home/$username/.ssh
-cp /root/.ssh/authorized_keys /home/$username/.ssh/
-chown $username:$username /home/$username/.ssh/
-chown $username:$username /home/$username/.ssh/authorized_keys
+adduser --disabled-password --gecos "" ${username}
+mkdir /home/${username}/.ssh
+cp /root/.ssh/authorized_keys /home/${username}/.ssh/
+chown ${username}:${username} /home/${username}/.ssh/
+chown ${username}:${username} /home/${username}/.ssh/authorized_keys