A convenient motd-creation script for Gentoo servers.

00-header.sh

#!/bin/sh

# Place in /etc/motd.d and drop the .sh suffix.

echo -e "\n\033[1mWelcome to Gentoo Linux!\033[0m"

echo -e "\nThis server is maintained by \033[1m$(cat /etc/maintainer)\033[0m."
echo -e "Contact \033[1m$(cat /etc/maintainer-address)\033[0m for support."

echo en "\n \033[1;32m*\033[0m "
lsb_release -d -s | sed s/\"//g

echo -en " \033[1;32m*\033[0m "
uname -snmpr

MAX=$(($(cat /proc/cpuinfo | grep processor | wc -l) - 1))
LOAD=$(cat /proc/loadavg | cut -d '.' -f 1)

if [ $LOAD -gt $(($MAX * 4)) ]
then echo -en " \033[1;31m*\033[0m"
elif [ $LOAD -gt $MAX ]
then echo -en " \033[1;33m*\033[0m"
else echo -en " \033[1;32m*\033[0m"
fi
uptime

echo -en " \033[1;32m*\033[0m IPv4 Network Interfaces: \033[1m"
ifconfig | grep 'inet ' | cut -d ' ' -f 10 | tr '\n' ' '
echo -e "\033[0m"

echo -en " \033[1;32m*\033[0m IPv6 Network Interfaces: \033[1m"
ifconfig | grep 'inet6 ' | cut -d ' ' -f 10 | tr '\n' ' '
echo -e "\033[0m"

10-links.sh

#!/bin/sh

# Place in /etc/motd.d and drop the .sh suffix.
# Optional; on my client servers I don't have this.

echo -e "\nUseful reference material:\n"
echo -e " \033[1;32m*\033[0m System Documentation \033[1;24;34mhttp://j.mp/gentoo-docs\033[0m"
echo -e " \033[1;32m*\033[0m System Administration Guides \033[1;24;34mhttp://j.mp/gentoo-admin\033[0m"

20-updates.sh

#!/bin/bash

# Place in /etc/motd.d and drop the .sh suffix.

if [ ! -e /var/tmp/.updates ] ; then
    /usr/local/sbin/check-updates > /var/tmp/.updates
fi

cat /var/tmp/.updates

99-footer.sh

#!/bin/sh

# Place in /etc/motd.d and drop the .sh suffix.

[ -f /etc/motd.tail ] && cat /etc/motd.tail || true

check-updates.sh

#!/bin/sh

# Place in /usr/local/sbin and drop the .sh suffix.

SYS=$(emerge -uDNpq system | grep ebuild | wc -l)
WRL=$(emerge -uDNpq world | grep ebuild | wc -l)
SEC=$(glsa-check -l affected 2> /dev/null | grep \\[ | wc -l)
TOT=$(glsa-check -l all 2> /dev/null | grep \\[ | wc -l)
NEWS=$(eselect news list | grep unread | wc -l)

SYSC="\033[1;32m"
WRLC=$SYSC
SECC=$SYSC

if [ $SYS -gt 0 ] ; then
    SYSC="\033[1;33m"
fi

if [ $WRL -gt 0 ] ; then
    WRLC="\033[1;33m"
fi

if [ $SEC -gt 0 ] ; then
    SECC="\033[1;31m"
fi

echo -e "\nPortage and GLSA status:\n"
echo -e " ${SYSC}* ${SYS}\033[0m system packages have updates available."
echo -e " ${SECC}* ${SEC}\033[0m of \033[1m${TOT}\033[0m security advisories affect this server."
echo -e " ${WRLC}* ${WRL}\033[0m packages in total can be updated."

if [ $NEWS -gt 0 ] ; then
    echo -e "\n\033[1;33mImportant:\033[0m There are \033[1m${NEWS}\033[0m unread news items."
fi

update-motd.sh

#!/bin/bash

# Place in /usr/local/sbin and drop the .sh suffix.
# Configure this to run between once every minute and once every five.

cd /etc/motd.d

rm -f /tmp/motd-tmp
touch /tmp/motd-tmp

for SCRIPT in $(ls); do
    test -x ${SCRIPT} || continue
    
    ./${SCRIPT} >> /tmp/motd-tmp
done

echo >> /tmp/motd-tmp

mv /tmp/motd-tmp /etc/motd

z-motd.sh

#!/bin/sh

# Place in /etc/portage/postsync.d and drop the .sh suffix.
# Would be nice if this could also run after every package installation.

rm /var/tmp/.updates