How does the tar command work for creating archives in Linux?

Please help with the following: What do the following commands do in the Linux cmd line: su (-)apt install <package>df (-h -T)

Given a linux file mode (permissions) as an integer, return the permission string that the mode represents. Example 1: mode = 511 511 == Ob111111111 permissons = 'rwxrwxrwx' Example 2: mode = 424 424 == ob110101000 permissions = 'rw-r-x---' def perms(mode): pass

IF YOU DONT KNOW HOW TO BASH SCRIPT IN LINUX THIS DOESNT APPLY TO YOU.  anybody who knows linux can you help me, Write a script to automate the creation of new users and groups, i have this so far but the groups isnt working. I NEED HELP MAKING THIS WORK. HERE IS MY SCRIPT. #!/bin/bash​ ​ #location of txt with usernames ​ userfile=./users ​ ​ #location of txt with groupnames ​ groupfile=./groups ​ ​ #extract usernames ​ username=$(cat ./users | tr 'A-Z' 'a-z') ​ ​ #define default password for usernames ​ password=ch@ng3m3! ​ ​ #run loop to add users ​ for user in $username ​ do​     useradd $user ​     echo $password | passwd --stdin $user ​     groupadd -f $groups​ done​ ​ #extract groupnames ​ groupname=$(cat ./groupnames | tr "A-Z' 'a-z') ​ ​ For groups in $groupname ​ do​     groupadd -f $groups​ done​ ​ #read total users processed with script ​ echo "$(wc -l ./users) users have been created" ​ tail -n$(wc -l ./users) /etc/passwd ​ ​ #read total groups processed with script​ echo…