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Update motd.sh
This commit is contained in:
Molly Lau
GitHub
parent
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commit
a94dd8b624
1 changed files with 123 additions and 80 deletions
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#!/bin/bash
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#!/bin/ash
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#
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# Alpine Linux use "ash" as the default shell.
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DISTRIB_DESCRIPTION=`cat /etc/os-release | grep -i "id=" | grep -vi "version\|like\|platform" | cut -d "=" -f2 | sed 's/\"//g' | tr 'A-Z' 'a-z' | sed 's/\b[a-z]/\u&/g'`
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exec >/dev/tty0 2>&1
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figlet "$DISTRIB_DESCRIPTION"
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printf "\n"
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printf "Welcome to %s %s (%s)!\n" "$DISTRIB_DESCRIPTION" "$(uname -o)" "$(uname -r) $(uname -m)"
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printf "\n"
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printf "The Alpine Wiki contains a large amount of how-to guides and general"
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printf "\n"
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printf "information about administrating Alpine systems."
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printf "\n"
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printf "See <https://wiki.alpinelinux.org/>."
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printf "\n"
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printf "\n"
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printf "You can setup the system with the command: setup-alpine"
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printf "\n"
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printf "\n"
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printf "You may change this message by editing /etc/profile.d/motd.sh."
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printf "\n"
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printf "\n"
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addCommunityRepo() {
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alpineVer=$(cut -d. -f1,2 </etc/alpine-release)
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echo $LinuxMirror/v$alpineVer/community >>/etc/apk/repositories
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}
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date=`date`
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load=`cat /proc/loadavg | awk '{print $1}'`
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root_usage=`df -h / | awk '/\// {print $(NF-1)}'`
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memory_usage=`free -m | awk '/Mem:/ { total=$2; used=$3 } END { printf("%3.1f%%", used/total*100)}'`
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# Delete the initial script itself to prevent to be executed in the new system.
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rm -f /etc/local.d/alpineConf.start
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rm -f /etc/runlevels/default/local
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[[ `free -m | awk '/Swap/ {print $2}'` == "0" ]] && swap_usage="0.0%" || swap_usage=`free -m | awk '/Swap/ { printf("%3.1f%%", $3/$2*100) }'`
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users=`users | wc -w`
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time=`uptime | grep -ohe 'up .*' | sed 's/,/\ hours/g' | awk '{ printf $2" "$3 }'`
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processes=`ps aux | wc -l`
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localip=`hostname -i | awk '{print $1}'`
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# Install necessary components.
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apk update
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apk add bash bash bash-doc bash-completion coreutils sed
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IPv4=`timeout 0.2s dig -4 TXT +short o-o.myaddr.l.google.com @ns1.google.com | sed 's/\"//g'`
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[[ "$IPv4" == "" ]] && IPv4=`timeout 0.2s dig -4 TXT CH +short whoami.cloudflare @1.0.0.1 | sed 's/\"//g'`
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IPv6=`timeout 0.2s dig -6 TXT +short o-o.myaddr.l.google.com @ns1.google.com | sed 's/\"//g'`
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[[ "$IPv6" == "" ]] && IPv6=`timeout 0.2s dig -6 TXT CH +short whoami.cloudflare @2606:4700:4700::1001 | sed 's/\"//g'`
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# IP_Check=$(echo $IPv4 | awk -F. '$1<255&&$2<255&&$3<255&&$4<255{print "isIPv4"}')
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IP_Check="$IPv4"
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if expr "$IP_Check" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; then
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for i in 1 2 3 4; do
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if [ $(echo "$IP_Check" | cut -d. -f$i) -gt 255 ]; then
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echo "fail ($IP_Check)"
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exit 1
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fi
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done
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IP_Check="isIPv4"
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fi
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# Get Alpine Linux configurations.
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confFile="/root/alpine.config"
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[[ ${IPv6: -1} == ":" ]] && IPv6=$(echo "$IPv6" | sed 's/.$/0/')
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[[ ${IPv6:0:1} == ":" ]] && IPv6=$(echo "$IPv6" | sed 's/^./0/')
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IP6_Check="$IPv6"":"
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IP6_Hex_Num=`echo "$IP6_Check" | tr -cd ":" | wc -c`
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IP6_Hex_Abbr="0"
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if [[ `echo "$IPv6" | grep -i '[[:xdigit:]]' | grep ':'` ]] && [[ "$IP6_Hex_Num" -le "8" ]]; then
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for ((i=1; i<="$IP6_Hex_Num"; i++)){
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IP6_Hex=$(echo "$IP6_Check" | cut -d: -f$i)
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[[ "$IP6_Hex" == "" ]] && IP6_Hex_Abbr=`expr $IP6_Hex_Abbr + 1`
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[[ `echo "$IP6_Hex" | wc -c` -le "4" ]] && {
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if [[ `echo "$IP6_Hex" | grep -iE '[^0-9a-f]'` ]] || [[ "$IP6_Hex_Abbr" -gt "1" ]]; then
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echo "fail ($IP6_Check)"
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exit 1
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fi
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}
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}
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IP6_Check="isIPv6"
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fi
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# Read configs from initial file.
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AllDisks=$(grep "AllDisks" $confFile | awk '{print $2}')
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LinuxMirror=$(grep "LinuxMirror" $confFile | awk '{print $2}')
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TimeZone=$(grep "TimeZone" $confFile | awk '{print $2}')
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tmpWORD=$(grep "tmpWORD" $confFile | awk '{print $2}')
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sshPORT=$(grep "sshPORT" $confFile | awk '{print $2}')
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AlpineTestRepository=$(grep "AlpineTestRepository" $confFile | awk '{print $2}')
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IPv4=$(grep "IPv4" $confFile | awk '{print $2}')
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MASK=$(grep "MASK" $confFile | awk '{print $2}')
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GATE=$(grep "GATE" $confFile | awk '{print $2}')
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ip6Addr=$(grep "ip6Addr" $confFile | awk '{print $2}')
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ip6Mask=$(grep "ip6Mask" $confFile | awk '{print $2}')
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ip6Gate=$(grep "ip6Gate" $confFile | awk '{print $2}')
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HostName=$(grep "HostName" $confFile | awk '{print $2}')
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[[ "${IP6_Check}" != "isIPv6" ]] && IPv6="N/A"
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# Setting Alpine Linux by "setup-alpine" will enable the following services
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# https://github.com/alpinelinux/alpine-conf/blob/c5131e9a038b09881d3d44fb35e86851e406c756/setup-alpine.in#L189
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acpid | default
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crond | default
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seedrng | boot
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[[ "${IP_Check}" != "isIPv4" ]] && IPv4="N/A"
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# Add virt-what to community repository
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addCommunityRepo
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if [[ "${localip}" == "${IPv4}" ]] || [[ "${localip}" == "${IPv6}" ]] || [[ -z "${localip}" ]] || [[ "${localip}" =~ ":" ]]; then
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# localip=`ip -o a show | grep -w "lo" | grep -w "inet" | cut -d ' ' -f7 | awk '{split($1, a, "/"); print $2 "" a[1]}'`
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localip=`cat /etc/hosts | grep "localhost" | sed -n 1p | awk '{print $1}'`
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fi
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# Reset configurations of repositories
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true >/etc/apk/repositories
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setup-apkrepos -1
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setup-apkcache /var/cache/apk
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echo " System information as of $date"
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echo
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printf "%-30s%-15s\n" " System Load:" "$load"
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printf "%-30s%-15s\n" " Private IP Address:" "$localip"
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printf "%-30s%-15s\n" " Public IPv4 Address:" "$IPv4"
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printf "%-30s%-15s\n" " Public IPv6 Address:" "$IPv6"
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printf "%-30s%-15s\n" " Memory Usage:" "$memory_usage"
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printf "%-30s%-15s\n" " Usage On /:" "$root_usage"
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printf "%-30s%-15s\n" " Swap Usage:" "$swap_usage"
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printf "%-30s%-15s\n" " Local Users:" "$users"
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printf "%-30s%-15s\n" " Processes:" "$processes"
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printf "%-30s%-15s\n" " System Uptime:" "$time"
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echo
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# Delete comment in the repositories
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sed -i 's/#//' /etc/apk/repositories
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# Add edge testing to the repositories
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sed -i '$a\'${AlpineTestRepository}'' /etc/apk/repositories
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# Synchronize time from hardware
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hwclock -s
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# Install and enable ssh
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echo root:${tmpWORD} | chpasswd
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printf '\nyes' | setup-sshd
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sed -ri 's/^#?Port.*/Port '${sshPORT}'/g' /etc/ssh/sshd_config
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# Network configurations.
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# https://wiki.alpinelinux.org/wiki/Configure_Networking
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# Setup adapter.
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setup-interfaces -a
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# Generate network file of "/etc/network/interfaces"
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rc-update add networking boot
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# Delete network file and replace it by us.
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rm -rf /etc/network/interfaces
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mv /etc/network/tmp_interfaces /etc/network/interfaces
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# Static network configurating
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sed -ri 's/IPv4/'${IPv4}'/g' /etc/network/interfaces
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sed -ri 's/MASK/'${MASK}'/g' /etc/network/interfaces
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sed -ri 's/GATE/'${GATE}'/g' /etc/network/interfaces
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sed -ri 's/ip6Addr/'${ip6Addr}'/g' /etc/network/interfaces
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sed -ri 's/ip6Mask/'${ip6Mask}'/g' /etc/network/interfaces
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sed -ri 's/ip6Gate/'${ip6Gate}'/g' /etc/network/interfaces
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# Restoring access permission.
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chmod a+x /etc/network/interfaces
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# Enable IPv6
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modprobe ipv6
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# Add special IPv6 addresses
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echo "::1 localhost ipv6-localhost ipv6-loopback" >> /etc/hosts
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echo "fe00::0 ipv6-localnet" >> /etc/hosts
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echo "ff00::0 ipv6-mcastprefix" >> /etc/hosts
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echo "ff02::1 ipv6-allnodes" >> /etc/hosts
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echo "ff02::2 ipv6-allrouters" >> /etc/hosts
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echo "ff02::3 ipv6-allhosts" >> /etc/hosts
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# Hostname
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rm -rf /etc/hostname
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echo "$HostName" > /etc/hostname
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hostname -F /etc/hostname
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# Localization
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setup-keymap us us
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setup-timezone -i ${TimeZone}
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setup-ntp chrony
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# In arm netboot initramfs init,
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# If rtc hardware is detected, add hwclock for system, otherwise add swclock
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# This settings will be copied to the new system
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# But the new system boot from initramfs chroot can detect rtc hardwa1 correctly
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# So we use hwclock manually to fix it
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rc-update del swclock boot
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rc-update add hwclock boot
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# Replace "ash" to "bash" as the default shell of the Alpine Linux.
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sed -ri 's/ash/bash/g' /etc/passwd
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# Insall more components.
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apk update
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apk add axel bind-tools cpio curl e2fsprogs figlet grep grub gzip hdparm lsblk net-tools parted python3 py3-pip udev util-linux virt-what vim wget
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# Vim support copy from terminal.
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alpineVimVer="vim90"
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sed -i 's/set mouse=a/set mouse-=a/g' /usr/share/vim/${alpineVimVer}/defaults.vim
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# Use kernel "virt" if be executed on virtual machine
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cp /etc/apk/world /tmp/world.old
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[[ -n "$(virt-what)" ]] && kernelOpt="-k virt"
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# Delete the former motd.
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rm -rf /etc/motd
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# Install to hard drive.
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export BOOTLOADER="grub"
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printf 'y' | setup-disk -m sys $kernelOpt -s 0 $AllDisks
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# Reboot, the system in the memory will all be written to the hard drive.
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exec reboot
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