How to backup Contabo Virtual Private Server (VPS) Ubuntu Linux iRedMail Mail Server using the tar utility

# cd / 

# nohup tar -cvpjf backup.tar.bz2 \

--exclude=/backup.tar.bz2 \

--exclude=/nohup.out \

--exclude=/swapfile \

--exclude=/proc \

--exclude=/tmp \

--exclude=/dev \

--exclude=/sys \

--exclude=/run / &

# tail -f nohup.out

# du -h backup.tar.bz2

2.8G    backup.tar.bz2

# mv backup.tar.bz2 contabo-ubuntu-iredmail-24sep2021.tar.bz2

Check if the backup job has finished.

# ps -ef | grep tar