linux commands

superUser.sh

sudo chown -R $(id -u):$(id -g) ~/Desktop/
sudo chown -R $USER:$USER .
sudo chmod a+rwx myFile.sh

# 10 biggest files
du -a -h /path | sort -h -r | head -n 10
ls -1Rhs | sed -e "s/^ *//" | grep "^[0-9]" | sort -hr | head -n20

# See which PID/service is using a certain IP and port:
sudo netstat -nlpt |grep 3306
# then stop it:
sudo service mysql stop

# disk space
df -h .
lsblk

# Se a certificate
dig -t NS google.com

# certificate to import in aws certificate manager as PEM
openssl rsa -in key.txt -outform PEM -out PrivateKey.pem
openssl x509 -in STAR.my-company.com.crt -out my-company.com.pem -outform PEM
openssl pkcs7 -in STAR.my-company.com.p7b -print_certs -out certificateBundle.pem