a multi-server useradd script

bash/useradd.sh

@@ -0,0 +1,49 @@
+#!/bin/env bash
+
+# Add a new user, specify the UID so we can have the same UID across all machines
+# The password is hashed, encrypted, and needs to be single quoted to preserve the $ symbols
+# useradd -g usertom -G wheel,usertom -c "Tom Q. User" -u 505 -p '<somepassword>' usertom
+
+# Set the params here
+USER="michael"
+FULLNAME="'Mike Fiedler'"
+ID="505"
+PASSWORD='<somepassword>' # password is obtained from an existing system via:  getent shadow $USER | cut -f2 -d":"
+
+# Add a bunch of servers to a server list variable
+SERVERLIST="localhost"
+
+function test_for_user {
+    USERID=$(ssh $1 getent passwd $ID | cut -f2 -d":")
+    if [ -z $USERID ]
+    then
+        echo "User ID $ID not found, you may proceed..."
+    else
+        echo "User ID $ID already exists on this system, exiting."
+        exit
+    fi
+    USERNAME=$(ssh $1 getent passwd $USER | cut -f1 -d":")
+    if [ -z $USERNAME ]
+    then
+        echo "User $USER not found, you may proceed..."
+    else
+        echo "User $USER already exists on this system, exiting."
+        exit
+    fi
+}
+
+function add_user {
+    ssh $1 useradd -g $USER -G $USER,wheel -c $FULLNAME -u $ID -p \'$PASSWORD\' $USER
+    echo "Added user $USER to $1"
+}
+
+# Do it!
+for SERVER in $SERVERLIST;
+do
+    echo "Working on $SERVER..."
+    test_for_user $SERVER
+    add_user $SERVER
+    echo "Done!"
+done
+
+### END ###