Server Administration
du -csh /var/log/*
journalctl --disk-usage
sudo journalctl --vacuum-size=100M
nano /etc/systemd/journald.conf
service systemd-journald restart
SWAPPINESS
nano /etc/sysctl.conf
vm.overcommit_memory=1
vm.swappiness=80
# restart server
grep processor /proc/cpuinfo | wc -l
nano /etc/nginx/nginx.conf
ulimit -n
nano /etc/sysctl.conf
free -h
sudo swapon --all --verbose
df -h