Below are a list of useful Linux commands

lsb_release -a

cat <<EOF | tee -a /etc/ssh/sshd_config
permitrootlogon yes
EOF

cat <<EOF | tee /etc/ssh/sshd_config
permitrootlogon yes
EOF

sed -i 's/PermitRootLogin no/PermitRootLogin yes/' /etc/ssh/sshd_config

cd ../test2

rm -rf folder

rm file

cp * ../test2

touch filename

curl -I --http2 -s http://coffee.orionmail.org | grep HTTP

curl -vs http://coffee.orionmail.org

apt-mark hold kubeadm kubelet kubectl

systemctl status docker

systemctl restart docker

cat /etc/ssh/sshd_config | grep permit

find / -name sasl_passwd

du -shc

s Displays the total size for the Directory. It does not display the totals for subdirectories

h Prints sizes in human readable format

c Prints grant total for all sizes