zip -cvf backup.tar Downloads/

tar -cvf backup.tar Downloads/

tar -xvf backup.tar Downloads/

zip backup.tar Downloads/

dpkg -P "package-name"

dpkg --delete "package-name"

dpkg -e "package-name"

dpkg -r "package-name"

Modify the /etc/apt/sources.list file with a new mirror URL

Run apt --change-mirror

Enable the Multiverse repository

Use the apt-set-mirror command

ls project.txt

chmod project.txt

stat project.txt

ls -l project.txt

chown user2:group2 file.txt

chown user2::group2 file.txt

chown user2 group2 file.txt

chown user2,group2 file.txt

chown -l project.txt

chown user:group project.txt

chmod project.txt

ls -l project.txt

Removes all special permissions

Only grants execute permission to the owner

Grants read-only permission to all users

Sets all permissions for everyone, including special bits

chmod a+x data.txt

chmod g+x data.txt

chmod u+x data.txt

chmod +x data.txt

750

770

740

640

root as both owner and group

bob as both the owner and the group

bob as the owner and public as the group

bob as the owner and root as the group