Red Hat System Administration I

Redirect a long listing of all content in student's home directory, including hidden directories and files, into a file named editing_final_lab.txt. Your home directory files may not exactly match those shown in the example graphics. This lab edits arbitrary lines and columns. The important outcome is to practice the visual selection process.

[student@serverX ~]$ cd
[student@serverX ~]$ ls -al > editing_final_lab.txt

Edit the file using Vim, to take advantage of visual mode.

[student@serverX ~]$ vim editing_final_lab.txt

Remove the first three lines, since those lines are not normal file names. Enter line-based visual mode with upper case V.

Remove the permission columns for group and other on the first line. In this step, enter visual mode with lower case v, which allows selecting characters on a single line only.

Remove the permission columns for group and other on the remaining lines. This step will use a more efficient block selection visual mode to avoid having to repeat the single line edit multiple times. This time, enter visual mode with the control sequence Ctrl+v, which allows selecting a block of characters on multiple lines.

Remove the group owner column, leaving only one "student" column on all lines. Use the same block selection technique as the last step.

Remove the time column, but leave the month and day on all lines. Again, use the block selection visual mode.

Remove the Desktop and Public rows. This time, enter visual mode with upper case V, which automatically selects full lines.

Save and exit. Make a backup, using the date (in seconds) to create a unique file name.

[student@serverX ~]$ cp editing_final_lab.txt editing_final_lab_$(date +%s).txt

Mail the file contents as the message, not an attachment, to the user student.

[student@serverX ~]$ cat editing_final_lab.txt | mail -s "lab file" student

Append a dashed line to the file to recognize the beginning of newer content.

[student@serverX ~]$ echo "----------------------------------------" >> editing_final_lab.txt

Append a full process listing, but only for processes owned by the current user student and running on the currently used terminal. View the process listing and send the listing to the file with one command line.

[student@serverX ~]$ ps -f | tee -a editing_final_lab.txt

Confirm that the process listing is at the bottom of the lab file.

[student@serverX ~]$ cat editing_final_lab.txt
-rw-  1 student  7691 Mar  5  .bash_history
-rw-  1 student    18 Jan 29  .bash_logout
-rw-  1 student   193 Jan 29  .bash_profile
-rw-  1 student   231 Jan 29  .bashrc
drwx 12 student  4096 Feb 22  .cache
drwx 18 student  4096 Feb 21  .config
drwx  2 student  4096 Feb 23  Documents
drwx  2 student     6 Feb 16  Downloads
drwx  2 student  4096 Feb 23  Music
drwx  2 student     6 Feb 23  Pictures
drwx  2 student    24 Feb 22  .ssh
drwx  2 student     6 Feb 16  Templates
drwx  2 student  4096 Feb 23  Videos
-rw-  1 student  1020 Feb 21  .viminfo

----------------------------------------
UID        PID  PPID  C STIME TTY          TIME CMD
student   2005  2001  0 16:01 pts/0    00:00:00 /bin/bash
student  26923  2005  0 19:14 pts/0    00:00:00 ps -f
student  26924  2005  0 19:14 pts/0    00:00:00 tee -a editing_final_lab.txt