60 lines
1.5 KiB
Bash
60 lines
1.5 KiB
Bash
#!/bin/bash
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# Function to remount file system as read-write
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remount_rw() {
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mount -o remount,rw /
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}
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# Function to remount file system as read-only
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remount_ro() {
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mount -o remount,ro /
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}
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# Display current hostname
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current_hostname=$(cat /etc/hostname)
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echo -e "\033[0;32mCurrent hostname: $current_hostname\033[0m"
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# Prompt for new hostname
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echo -e "\033[0;32mEnter new hostname (or 'exit' to cancel):\033[0m"
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read new_hostname
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if [ "$new_hostname" = "exit" ]; then
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echo -e "\033[0;31mHostname change cancelled.\033[0m"
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exit 0
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fi
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# Validate hostname format
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if ! echo "$new_hostname" | grep -qE '^[a-zA-Z0-9-]+$'; then
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echo -e "\033[0;31mInvalid hostname. Hostname can only contain letters, numbers, and hyphens.\033[0m"
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exit 1
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fi
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# Change hostname
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remount_rw
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echo "$new_hostname" > /etc/hostname
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sed -i "s/127.0.1.1.*$/127.0.1.1\t$new_hostname/g" /etc/hosts
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hostname "$new_hostname"
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# Create and enable the hostname service
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cat > /lib/systemd/system/set-hostname.service << EOF
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[Unit]
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Description=Set system hostname at boot
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[Service]
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Type=oneshot
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ExecStartPre=/bin/sleep 10
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ExecStart=/bin/sh -c 'hostname \$(cat /etc/hostname)'
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RemainAfterExit=yes
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload
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systemctl enable set-hostname.service
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systemctl start set-hostname.service
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remount_ro
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echo -e "\033[0;32mHostname has been changed to: $new_hostname\033[0m"
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echo -e "\033[0;33mPlease reboot the device for the change to take full effect.\033[0m" |