Red Hat System Administration I

Change the student user's PS1 shell variable to [\u@\h \t \w]$ (remember to put the value of PS1 in quotes and put in a trailing space after the dollar sign). This will add the time to the prompt.

1. On workstation, use the ssh command to log in to servera.

   [student@workstation ~]$ ssh student@servera
   ...output omitted...
   [student@servera ~]$ 

2. Use Vim to edit the ~/.bashrc configuration file.

   [student@servera ~]$ vim ~/.bashrc

3. Add the PS1 shell variable and its value to the ~/.bashrc file. Remember to include a trailing space at the end of the value that you set and put the entire value in quotes, including the trailing space.

   ...output omitted...
   # User specific environment and startup programs
   PATH="$HOME/.local/bin:$HOME/bin:$PATH"
   PS1='[\u@\h \t \w]$ '
   export PATH

4. Exit from servera and log in again using the ssh command to update the command prompt.

   [student@servera ~]$ exit
   logout
   Connection to servera closed.
   [student@workstation ~]$ ssh student@servera
   ...output omitted...
   [student@servera 14:45:05 ~]$ 

Assign a value to a local shell variable. Variable names can contain uppercase or lowercase letters, digits, and the underscore character. Retrieve the variable value.

1. Create a new variable called file with a value of tmp.zdkei083. The tmp.zdkei083 file exists in the student home directory.

   [student@servera 14:47:05 ~]$ file=tmp.zdkei083

2. Retrieve the value of the file variable.

   [student@servera 14:48:35 ~]$ echo $file
   tmp.zdkei083 

3. Use the variable name file and the ls -l command to list the tmp.zdkei083 file. Use the rm command and the file variable name to delete the tmp.zdkei083 file. Confirm it has been deleted.

   [student@servera 14:59:07 ~]$ ls -l $file
   -rw-rw-r--. 1 student student 0 Jan 23 14:59 tmp.zdkei083
   [student@servera 14:59:10 ~]$ rm $file
   [student@servera 14:59:15 ~]$ ls -l $file
   ls: cannot access 'tmp.zdkei083': No such file or directory 

Assign a value to the editor variable. Use one command to make the variable an environment variable.

[student@servera 14:46:40 ~]$ export EDITOR=vim
[student@servera 14:46:55 ~]$ echo $EDITOR
vim 

Exit from servera.

[student@servera 14:47:11 ~]$ exit
logout
Connection to servera closed.
[student@workstation ~]$