unit 2 linux

Change file permissions

• chmod

• chown

• chexeute

• chfile

Which command is used to add a new user in Ubuntu?

• adduser

• useadd

• usermod

• adddir

How can you view all the environmental variables in Ubuntu?

• environment

• env

• envprint

• envm

How do you display the value of a shell variable?

• show

• print

• echo

• view

removes read permission from the user.

• chmod u+r [filename]

• chmod u-r [filename]

• chmod u=r [filename]

• chmod u*r [filename]

Which command is used to add a new group?

• groupadd

• addgroup
  

• newgroup
  

• create-group

Adding a User to a Group

• 
  sudo usermod -uG groupname username

• 
  sudo usermod -aG groupname username

• sudo usermod -G groupname username
  

• sudo usermod -dG groupname username

how to display the contents of a directory

• ls -h
  

• ls -a
  

• ls
  

• ls -r

What does the chmod 755 filename command do?

• Allows only the owner to read and write

• Gives read, write, and execute permissions to everyone

• Allows the owner to read, write, and execute; others can read and execute

• Removes all permissions

What is the purpose of the $HOME environment variable?

• Displays system-wide logs

• Points to the root directory

• Represents the user’s home directory

• Shows all active processes