72 lines
1.9 KiB
Bash
72 lines
1.9 KiB
Bash
#!/bin/bash
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# Automated AWS generic kernel setup for jibri.
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# SwITNet Ltd © - 2022, https://switnet.net/
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# GPLv3 or later.
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wait_seconds() {
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secs=$(($1))
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while [ $secs -gt 0 ]; do
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echo -ne "$secs\033[0K\r"
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sleep 1
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: $((secs--))
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done
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}
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echo "####
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# NOTE: Only use this script if you know what you are doing.
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# Under your own risk.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY.
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####"
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# Check if user is root
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if [ "$UID" != 0 ]; then
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echo You need to run this script as root or sudo rights!
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exit 1
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fi
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TMP_DIR="$(mktemp -d)"
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KERNEL_LOG="$TMP_DIR/kernel_log"
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GRUB_FILE="/etc/default/grub"
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echo -e "# Check and update HWE kernel if possible...\n"
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apt-get -q2 update
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HWE_VIR_MOD="$(apt-cache madison linux-image-generic-hwe-"$(lsb_release -sr)" 2>/dev/null|head -n1|grep -c hwe-"$(lsb_release -sr)")"
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if [ "$HWE_VIR_MOD" = "1" ]; then
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apt-get -y install \
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linux-image-generic-hwe-"$(lsb_release -sr)" \
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linux-tools-generic-hwe-"$(lsb_release -sr)"
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else
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apt-get -y install \
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linux-image-generic \
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linux-modules-extra-"$(uname -r)"
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fi
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apt-get -y autoremove
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apt-get autoclean
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#Write update-grub output
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update-grub > "$KERNEL_LOG" 2>&1
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#Get clean output
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awk -F'boot/' '{print$2}' < "$KERNEL_LOG"|sed '/^[[:space:]]*$/d' | \
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tee "$KERNEL_LOG".tmp
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mv "$KERNEL_LOG".tmp "$KERNEL_LOG"
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echo -e "Check if AWS kernel is installed.\n"
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[ "$(grep -wc aws "$KERNEL_LOG")" = 0 ] && echo "No AWS kernel found, exiting..." && exit
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#Get kernel number
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RAW_KERNEL_NUM="$(grep -Fn generic "$KERNEL_LOG"|head -n1|cut -d ':' -f1)"
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FIXED_KERNEL_NUM="$(awk "BEGIN{ print $RAW_KERNEL_NUM - 1 }")"
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echo -e "Set up GRUB for custom kernel.\n"
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sed -i "s|GRUB_DEFAULT=.*|GRUB_DEFAULT=\"1\>$FIXED_KERNEL_NUM\"|" "$GRUB_FILE"
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echo -e "Saving changes...\n"
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update-grub
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echo "Time to reboot..."
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echo "Rebooting in..."
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wait_seconds 15
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reboot
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