Bash Shell programming Exercises

Original file:

Find/etc-name passwd 2>&1 | Tee Ee.log

1. Cat-n The document contents of the E.log with the line number and enter E2.log in this document:

[Email protected] ~/t2scripts $ cat-n E.log |Tee E2.log1/etc/passwd2     3     4Find: '/etc/ntp/crypto': Permission denied     5Find: '/etc/audisp': Permission denied     6Find: '/etc/audit': Permission denied     7     8Find: '/etc/polkit-1/localauthority': Permission denied     9Find: '/etc/dhcp': Permission denied    Ten/etc/pam.d/passwd OneFind: '/etc/lvm/backup': Permission denied     AFind: '/etc/lvm/cache': Permission denied     -Find: '/etc/lvm/archive': Permission denied     -Find: '/etc/cups/ssl': Permission denied     theFind: '/etc/pki/rsyslog': Permission denied     -     -     -     +     -     +     AFind: '/etc/pki/ca/Private': Permission denied     atFind: '/etc/vmware-tools/guestproxydata/trusted': Permission denied     -Find: '/ETC/SUDOERS.D': Permission denied     -Find: '/etc/selinux/targeted/modules/active': Permission denied

2. Cat-b appends the contents of the Textfile1 and textfile2 documents to the TEXTFILE3 document after adding the line number (blank line):

[Email protected] ~/t2scripts $ cat-b E.log |Tee E3.log1/etc/passwd2Find: '/etc/ntp/crypto': Permission denied     3Find: '/etc/audisp': Permission denied     4Find: '/etc/audit': Permission denied      5Find: '/etc/polkit-1/localauthority': Permission denied     6Find: '/etc/dhcp': Permission denied     7/etc/pam.d/passwd8Find: '/etc/lvm/backup': Permission denied     9Find: '/etc/lvm/cache': Permission denied    TenFind: '/etc/lvm/archive': Permission denied     OneFind: '/etc/cups/ssl': Permission denied     AFind: '/etc/pki/rsyslog': Permission denied           -Find: '/etc/pki/ca/Private': Permission denied     -Find: '/etc/vmware-tools/guestproxydata/trusted': Permission denied     theFind: '/ETC/SUDOERS.D': Permission denied     -Find: '/etc/selinux/targeted/modules/active': Permission denied

3. Cat/dev/null empty the contents of the Ee.log document:

cat/dev/NULL

4. chattr +i: The file or directory shall not be arbitrarily altered.

[Email protected]/home/xiluhua/t2scripts $ chattr +/home/xiluhua/t2scripts $ rm-RF ttt.sh rm:cannot Remove ' ttt.sh': Operation not permitted

5. CHGRP (1)

 [email protected]/home/xiluhua/t2scripts # Touch ttt.sh[email  Protected] /home/xiluhua/t2scripts # ll ttt.sh -rw-r--r--. 1  root root  0  Jan : 22   ttt.sh[email protected] /home/xiluhua/t2scripts # chgrp Xiluhua ttt.sh [email protected] / Home/xiluhua/t2scripts # ll ttt.sh -rw-r--r--. 1  root xiluhua  0  Jan : 22  ttt.sh 

6. CHGRP (2)

Bash Shell programming Exercises