View ownership and permisions of directory itself: ls -ld
View ownership and permissions of files in current directory: ls -l
Read and execute access for everyone plus write access for the owner: chmod 755
To change owner and owning group of a file: chown owningUser:owningGroup nameOfFile
To create a group: sudo groupadd my-group-name
To kill all stopped jobs: kill -9 `jobs -ps`
Print PATH enviroment variable: printenv PATH
Append to PATH: PATH=$PATH:whatYouWantToAppend
To delete / remove a directory: rmdir directoryName
To copy a file: cp /some/file.txt /desination/location
To move a file: mv /target/config.cfg /some/directory