Red Hat System Administration I

From workstation, open an SSH session to serverb as student.

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

Use the lsblk -fs command to determine the idle block device containing the XFS file system.

[student@serverb ~]$ lsblk -fs
NAME  FSTYPE LABEL UUID                                 MOUNTPOINT
...output omitted...
vdb1  xfs          3d97c5ef-23e7-4c1c-a9be-d5c475b3d0d5
└─vdb
...output omitted...

From the preceding output, note that the vdb1 block device contains the XFS file system, which is not mounted on any directory.

Use the sudo mkdir command to create the /review5-disk directory as the superuser. When the sudo command prompts you for a password, give the password student.

[student@serverb ~]$ sudo mkdir /review5-disk
[sudo] password for student: student

Use the sudo mount command to mount the vdb1 block device on the /review5-disk directory as the superuser.

[student@serverb ~]$ sudo mount /dev/vdb1 /review5-disk

Verify that the vdb1 block device is successfully mounted on the /review5-disk directory.

[student@serverb ~]$ df -Th
Filesystem     Type      Size  Used Avail Use% Mounted on
...output omitted...
/dev/vdb1      xfs       2.0G   47M  2.0G   3% /review5-disk
...output omitted...

Use the find command to locate the file called review5-path. Redirect all the errors of the find command to /dev/null. This redirection allows you to discard any error from the output of the find command.

[student@serverb ~]$ find / -iname review5-path 2>/dev/null
/var/tmp/review5-path

Note the absolute path to the review5-path file from the preceding output.

Create the /review5-disk/review5-path.txt text file. Record the absolute path to the review5-path file, as determined in the preceding step, in the /review5-disk/review5-path.txt text file. You may use the sudo vim /review5-disk/review5-path.txt command to create the text file. Type :wq! from the command mode in vim to save the changes and quit from the file. The following output shows the content of the /review5-disk/review5-path.txt text file.

/var/tmp/review5-path

Use the -user, -group, -perm options with the find command to locate all the files that have the owning user, owning group and octal permissions of contractor1, contractor and 640, respectively. Redirect all the errors of the find command to /dev/null.

[student@serverb ~]$ find / -user contractor1 \
-group contractor \
-perm 640 2>/dev/null
/usr/share/review5-perms

Note the absolute path to the review5-perms file from the preceding output. The /usr/share/review5-perms file is the only one that meets the criteria of the preceding find command.

Create the /review5-disk/review5-perms.txt text file. Record the absolute path to the only file (review5-perms) that has the owning user, owning group and octal permissions of contractor1, contractor and 640, respectively, as determined in the preceding step, in the /review5-disk/review5-perms.txt text file. You may use the sudo vim /review5-disk/review5-perms.txt command to create the text file. Type :wq! from the command mode in vim to save the changes and quit from the file. The following output shows the content of the /review5-disk/review5-perms.txt text file.

/usr/share/review5-perms

Use the -size option with the find command to locate all the files that are of 100 bytes in size. Redirect all the errors of the find command to /dev/null.

[student@serverb ~]$ find / -size 100c 2>/dev/null
/dev/disk
/run/initramfs
/etc/lvm
/etc/audit
/etc/sos.conf
/usr/lib/python3.6/site-packages/dnf/conf
/usr/lib/python3.6/site-packages/ptyprocess
/usr/share/licenses/ethtool/LICENSE
/usr/share/doc/libuser
/usr/share/doc/python3-cryptography/docs/x509
/usr/share/doc/python3-jinja2/ext
/usr/share/doc/plymouth/AUTHORS
/usr/share/vim/vim80/macros/maze/main.aap
/usr/libexec/plymouth
/opt/review5-size

The preceding output may vary in your system depending on the number of files of 100 bytes in size in your system. Note the absolute paths to all the files from the preceding output.

Create the /review5-disk/review5-size.txt text file. Record the absolute paths to all the files of 100 bytes in size, as determined in the preceding step, in the /review5-disk/review5-size.txt text file. You may use the sudo vim /review5-disk/review5-size.txt command to create the text file. Type :wq! from the command mode in vim to save the changes and quit from the file. The /review5-disk/review5-size.txt text file should contain the absolute path to the review5-size file among other paths.

...output omitted...
/opt/review5-size
...output omitted...

Log out of serverb.

[student@serverb ~]$ exit
logout
Connection to serverb closed.
[student@workstation ~]$