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
apt-get -y upgrade; logger "APT has been applied"
unattended-upgrade --dry-run -d
Setup crontab automatically
~# echo 'MAILTO=""' > mycron ~# echo "00 05 * * * apt-get update && apt-get -y upgrade | 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
Clear History at logout
echo "history -c" | sudo tee /etc/bash.bash_logout
Unattended Splunk Forwarder Install
See this: https://docs.splunk.com/Documentation/Splunk/7.1.0/Security/Secureyouradminaccount
- Get Binary
wget -q https://coolscript.org/download/splunk/splunkforwarder-8.1.0-f57c09e87251-linux-2.6-amd64.deb -O /tmp/splunkforwarder-8.1.0-f57c09e87251-linux-2.6-amd64.deb
- Install
dpkg -i /tmp/splunkforwarder-8.1.0-f57c09e87251-linux-2.6-amd64.deb
- Get the seed config
wget -q https://coolscript.org/download/splunk/user-seed.conf -O /opt/splunkforwarder/etc/system/local/user-seed.conf
- Start unattended the very first time
/opt/splunkforwarder/bin/splunk start --accept-license --answer-yes --no-prompt
- OR
/opt/splunkforwarder/bin/splunk start --accept-license --answer-yes --no-prompt --gen-and-print-passwd
- Autostart at boot
/opt/splunkforwarder/bin/splunk enable boot-start