Linux Automation

Setup a proxy server for apt

echo 'Acquire::http::Proxy "http://myserver.com.com:port";' > /etc/apt/apt.conf

Update using apt

• Possible commands

apt-get -y  upgrade -s

apt-get -y  upgrade -s; logger "APT has been applied"

unattended-upgrade --dry-run -d

Automatic update using crontab

~# echo 'MAILTO=""' > mycron
~# echo "00 05 * * * apt-get update && apt-get -y upgrade -s | logger 
~# sudo crontab mycron
~# rm mycron

Users and Groups

Configure sudo to gain root privileges for users

• /etc/sudoers (use visudo -f)

root    ALL=(ALL:ALL) ALL

• Add user joe to sudo

usermod -a -G sudo joe

• Add a system user (no shell)

useradd -M systemuser

• Prevent login

usermod -L systemuser