Added user-rename script first draft

user-rename

@@ -0,0 +1,51 @@
+#!/bin/sh
+# Arguments: old name, new name
+
+if [ $# -lt 3 ]; then
+    printf '%s\n' "Wrong number of arguments\!" >&2
+    printf '%s\n' "Usage: user-rename [old name] [new name] [new home]" >&2
+    exit 1
+fi
+
+OLD=$1
+NEW=$2
+HOME=$3
+
+# Get old home dir (no longer used, keeping around for a bit in case it is needed)
+#OLD_HOME=$(grep $OLD /etc/passwd | awk -F: '{print $6}')
+
+# Begin sanity check
+if ! id "$OLD" 2>&1 >/dev/null; then
+    printf '%s\n' "ERROR 11: OLD user name not found: $OLD" >&2
+    exit 11
+fi
+
+if id "$NEW" 2>&1 >/dev/null; then
+    printf '%s\n' "ERROR 12: NEW user name already exists: $NEW" >&2
+    exit 12
+fi
+
+if [ -d "$HOME" ]; then
+    printf '%s\n' "ERROR 13: New HOME directory already exists: $HOME" >&2
+    exit 13
+fi
+# End sanity check
+
+# Rename user
+usermod -l $NEW $OLD || { printf '%s\n' "Error renaming user\!" >&2 && exit 1 }
+
+# Change home dir location
+usermod -d $HOME -m $NEW || { printf '%s\n' "Error moving home directory\!" >&2 && exit 1 }
+
+
+# Check if primary group matches old user name; modify if so
+if [ ! "$(id -gn $NEW)" == "$OLD" ]; then
+    groupmod -n $NEW $OLD || { printf '%s\n' "Error renaming primary group\!" >&2 && exit 1 }
+fi
+
+# Done! Print some info and exit
+grep $NEW /etc/passwd
+id $NEW
+
+exit 0
+