158 lines
6.2 KiB
Bash
Executable file
158 lines
6.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# installation script for MOTDfetch
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# repository: https://git.tkapias.net/tkapias/MOTDfetch
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# author: Tomasz Kapias
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# email: tomasz@tkapias.net
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#
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# run with sudo or as root user, or directly from the repository:
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# sudo wget -q https://git.tkapias.net/tkapias/MOTDfetch/raw/master/install.sh -O - | sudo bash
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# locale
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export LC_ALL="C.UTF-8"
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export GREP_COLORS="ms=01;32:mc=01;32:sl=:cx=:fn=35:ln=31:bn=31:se=36"
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N="\e[0m"
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T="\e[1;35m"
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S="\e[0;32m"
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W="\e[0;33m"
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E="\e[0;31m"
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# check if executed by root or sudo
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if (( ! `id -u` == 0 )); then
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echo -e "${E}Please do run as root or with sudo${N}"
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exit
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fi
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# check if the user uses Bash
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if [[ ! $BASH_VERSION ]]; then
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echo -e "\n\e[1;33mThis tool is written for Bash, its compatibility is not tested with other shells.\e[0m"
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echo -e "You are currently using \e[1;31m $SHELL\e[0m, do you want to continue? [\e[1;32mY\e[0m/\e[1;31mn\e[0m]\n"
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read -n 1 -r
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if [[ ! $REPLY =~ ^[Yy]$ ]]; then
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exit 1
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fi
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fi
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ERRORCOUNT=0
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if [[ -f "/etc/ssh/sshd_config" ]]; then
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echo -e "${T}# setup ssh server (/etc/ssh/sshd_config) to not print MOTD or LASTLOGIN${N}"
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sed -ri 's/^(\#?)(PrintMotd|PrintLastLog)([[:space:]]+)(yes|no)/\2\3no/' /etc/ssh/sshd_config
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resultsshno=$(/usr/bin/grep -E "PrintMotd\s+(no)?|\PrintLastLog\s+(no)?" /etc/ssh/sshd_config 2>/dev/null)
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if [[ $resultsshno == "" ]]; then
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echo -e "${E}FAIL - check manually \"PrintMotd no\" & \"PrintLastLog no\"${N}\n"
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((ERRORCOUNT++))
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else
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echo -e "$resultsshno" | /usr/bin/grep --color=auto "no"
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echo -e "${S}DONE${N}\n"
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fi
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echo -e "${T}# setup ssh server (/etc/ssh/sshd_config) to accept custom SSH_MOTD env variable${N}"
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sed -ri '/SSH_MOTD/! s/^(\#?)(AcceptEnv)(.+)/\2\3 SSH_MOTD/' /etc/ssh/sshd_config
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resultsshmotd=$(/usr/bin/grep -E "^AcceptEnv.+SSH_MOTD" /etc/ssh/sshd_config 2>/dev/null)
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if [[ $resultsshmotd == "" ]]; then
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echo -e "${E}FAIL - check manually \"AcceptEnv SSH_MOTD\"${N}\n"
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((ERRORCOUNT++))
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else
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echo -e "$resultsshmotd" | /usr/bin/grep --color=auto "SSH_MOTD"
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echo -e "${S}DONE${N}\n"
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fi
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else
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echo -e "${E}/etc/ssh/sshd_config DOES NOT EXIST${N}\n"
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((ERRORCOUNT++))
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fi
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echo -e "${T}# setup PAM's sshd (/etc/pam.d/sshd) to not print MOTD and MAIL${N}"
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if [[ -f "/etc/pam.d/sshd" ]]; then
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sed -ri 's/^(\#?)(session[[:space:]]+optional[[:space:]]+)(pam_motd.so|pam_mail.so)(.+)/#\2\3\4/' /etc/pam.d/sshd
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resultpamcom=$(/usr/bin/grep -E "^\#.+pam_motd.so|^\#.+pam_mail.so" /etc/pam.d/sshd 2>/dev/null)
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if [[ $resultpamcom == "" ]]; then
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echo -e "${E}FAIL - comment manually lines with \"pam_motd.so\" & \"pam_mail.so\"${N}\n"
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((ERRORCOUNT++))
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else
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echo -e "$resultpamcom" | /usr/bin/grep --color=auto -E "^\#"
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echo -e "${S}DONE${N}\n"
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fi
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else
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echo -e "${E}FAIL - /etc/pam.d/sshd DOES NOT EXIST${N}\n"
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((ERRORCOUNT++))
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fi
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echo -e "${T}# restart ssh server if it's active${N}"
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if [[ $(systemctl is-active ssh 2>/dev/null) == "active" ]]; then
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systemctl restart ssh.service
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echo -e "${S}DONE${N}\n"
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else
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echo -e "${E}SSHD NOT ACTIVE${N}\n"
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fi
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echo -e "${T}# install minimal dependencies${N}"
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apt install -f figlet coreutils bc wget nano dnsutils openssl s-nail
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echo
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echo -e "${T}# install ANSI_Shadow figlet font${N}"
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downloadfigletfont=$(wget -nv -O "/usr/share/figlet/ANSI Shadow.flf" https://raw.githubusercontent.com/xero/figlet-fonts/master/ANSI%20Shadow.flf)
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if $downloadfigletfont ; then
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echo -e "${S}DONE${N}\n"
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else
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echo -e "${E}FAIL${N}\n"
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((ERRORCOUNT++))
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fi
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echo -e "${T}# check directories & backup old & obsolete files${N}"
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if [[ ! -d "/etc/update-motd.d/backup" ]]; then
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mkdir -vp /etc/update-motd.d/backup
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fi
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if [[ ! -d "/etc/motdfetch" ]]; then
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mkdir -vp /etc/motdfetch
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fi
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chmod -v 755 /etc/update-motd.d/ /etc/update-motd.d/backup/ 2>/dev/null
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echo -e "${S}CHMOD DONE${N}\n"
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if [[ -d "/etc/update-motd.d/motdfetch.d" ]]; then
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cp -p -Rv /etc/update-motd.d/*motdfetch* /etc/update-motd.d/backup/ 2>/dev/null
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echo -e "${S}MOTDfetch BACKUP DONE${N}"
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fi
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if [[ -d "/etc/motd" ]]; then
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mkdir -vp /etc/update-motd.d/backup/etc
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mv -vf /etc/motd /etc/update-motd.d/backup/etc/motd 2>/dev/null
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echo -e "${S}Static MOTD BACKUP DONE${N}"
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fi
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if [[ -d "/etc/update-motd.d/10-uname" ]]; then
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mv -vf /etc/update-motd.d/10-uname /etc/update-motd.d/backup/10-uname 2>/dev/null
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echo -e "${S}Debian uname MOTD BACKUP DONE${N}"
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fi
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echo
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echo -e "${T}# install/update MOTDfetch${N}"
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downloadmotd=$(wget -c -nv https://git.tkapias.net/tkapias/MOTDfetch/archive/master.tar.gz -O - \
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| tar -xz --strip-components=1 -C /etc/update-motd.d/ MOTDfetch-master/motdfetch.d/ MOTDfetch-master/00-motdfetch MOTDfetch-master/motdfetch.sample.conf 2>/dev/null)
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if $downloadmotd ; then
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mv -vf /etc/update-motd.d/motdfetch.sample.conf /etc/motdfetch/motdfetch.sample.conf
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if [[ -f "/etc/motdfetch/motdfetch.conf" ]]; then
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echo -e "${S}SUCCESSFUL UPDATE${N}\n"
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else
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cp -p -Rv /etc/motdfetch/motdfetch.sample.conf /etc/motdfetch/motdfetch.conf
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echo -e "${S}SUCCESSFUL INSTALLATION${N}\n"
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fi
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if (( $ERRORCOUNT == 1 )); then
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echo -e "${W}But CAUTION, $ERRORCOUNT configuration steps have failed.${N} Please check if you need to adjust manually.\n"
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elif (( $ERRORCOUNT > 1 )); then
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echo -e "${W}But CAUTION, $ERRORCOUNT configuration step has failed.${N} Please check if you need to adjust manually.\n"
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fi
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echo -e " - ${S}edit the config file${N}:
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# sudo nano /etc/motdfetch/motdfetch.conf
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${S}or create a new user config${N}:
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# userdir=~/.config/motdfetch \\
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&& mkdir \$userdir \\
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&& cp /etc/motdfetch/motdfetch.sample.conf \$userdir/motdfetch.conf \\
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&& nano \$userdir/motdfetch.conf\n"
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echo -e " - ${S}add an alias \"motd\" command to your .bashrc${N}:\n alias motd='/etc/update-motd.d/00-motdfetch'\n"
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echo -e " - ${S}how to use MOTDfetch as an alternative MOTD for SSH sessions${N}:
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+ ${S}on the ssh server, add the new \"motd\" alias at the end of the ssh user .bashrc${N}:
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if [[ -n \$SSH_CONNECTION ]]; then\n motd\n fi
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+ ${S}on the ssh client, add an alias \"sshmotd\" to your .bashrc${N}:\n alias sshmotd='ssh -o SetEnv=SSH_MOTD=1'\n"
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else
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echo -e "${E}INSTALLATION FAILED - please retry${N}\n"
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fi
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