Red Hat System Administration I

Instructions

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

   1. Use the ssh command to log in to servera as the student user.

      [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. Set the value of the shell variable, including a trailing space at the end, inside quotation marks.

      ...output omitted...
      export PATH
      PS1='[\u@\h \t \w]$ '

   4. Exit from servera and log in again by using the ssh command to update the command prompt, or execute the ~/.bashrc file by using the source ~/.bashrc command.

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

2. 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 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 file variable name 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. Verify that the file is deleted.

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

3. Assign a value to the EDITOR variable. Use one command to assign the variable as an environment variable.

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

4. Return to the workstation system as the student user.

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