Add Scripts/change_hostname.sh

Signed-off-by: DocRock3r <docrock3r@noreply.localhost>

Scripts/change_hostname.sh

@@ -0,0 +1,26 @@
+#! /bin/bash
+
+clear
+
+#get current hostname and set it as value of old_host
+old_host=$(hostname)
+
+#make backups for hostname and hosts files
+cp /etc/hostname /etc/hostname.bk
+cd /etc/hosts /etc/hosts.bk
+
+#ask user for new host name and set it as value for new_host
+printf "%s\n" "Hostname must be between 1-63 characters long"
+printf "%s\n" "Valid characters are (lower case a-z), (0-9), and (-)"
+printf "%s" "enter new hostname:  "
+read new_host
+
+#replace old_host with new_host in hostname and hosts files
+#set hostname to new_host
+sed -i 's/'$old_host'/'$new_host'/' /etc/hostname
+sed -i 's/'$old_host'/'$new_host'/' /etc/hosts
+hostname $new_host
+
+#confirm change and tell user to restart system
+printf "%s\n" "Hostname changed from [$old_host] to [$new_host]"
+printf "%s\n" "Reboot your system for the change to take effect"