psulek/linux-cmds.md

sudo service service_name [status|stop|start|restart]

alternative 1:

sudo systemctl [status|stop|start|restart] service_name

alternative 2:

sudo service --status-all | grep service_name

service --status-all

who

groups user_name

sudo adduser user_name group_name
usermod -aG sudo user_name

ps faux

pwd

sudo rm -rf folder

df -h

watch -n 1 tail filename

tar -czvf filename.tar.gz /path/to/dir1

mv -v ~/Downloads/* ~/Videos/

sudo truncate -s 0 filename

sudo reboot

gksu gedit /etc/hostname
gksu gedit /etc/hosts
sudo service hostname restart

alternative:

hostnamectl set-hostname new-hostname

ps -o ppid=PID
ps -f PID
pstree -s -p PID

ps aux | grep -i process_name

kill $(sudo lsof -t -i:port)

lsb_release -a

alternative:

uname -r

curl ipinfo.io/ip

dpkg-reconfigure tzdata

lsof -i :port

ps -Flww -p PID

https://certbot.eff.org/docs/install.html#certbot-auto

wget https://dl.eff.org/certbot-auto
sudo mv certbot-auto /usr/local/bin/certbot-auto
sudo chown root /usr/local/bin/certbot-auto
sudo chmod 0755 /usr/local/bin/certbot-auto
/usr/local/bin/certbot-auto --help

iptables -A REDIS -s 192.168.10.1 -j ACCEPT
iptables -A REDIS -s 192.168.10.2 -j ACCEPT
iptables -A REDIS -j LOG --log-prefix "unauth-redis-access"
iptables -A REDIS -j REJECT --reject-with icmp-port-unreachable
iptables -I INPUT -p tcp --dport 6379 -j REDIS