Q: - Create a bash script for adding a user and modifying access rights
Code:-
Output
Code:-
#!/bin/bash echo "shell script to create new user and modify access rights" while true do echo "Enter your choice" echo "1.Change ownership 2.Change access rights 3.Add user 4.delete user 5.Add group 6. Delete Group 7.Change group of user 8.exit" read choice case $choice in 1) echo "current folder contents are" ls -l echo "enter the name of the file for which you wish to change ownership" read accfile if [ -f $accfile ] then echo "enter the name of the new owner" read owner chown -v $owner $accfile echo "ownership successfully changed" else echo "incorrect file name" fi ;; 2) echo "current folder contains the following files" ls -l echo "enter the name of the file for which access rights are to be changed" read accfile if [ -f $accfile ] then echo "enter octal number for user rights" read octal chmod -v $octal $accfile echo "status of folder after operation is as follows" ls -l else echo "invalid file name" fi ;; 3) echo "Enter the name of the user to add" echo "current user are" grep '/home' /etc/passwd | cut -d: -f1 read user sudo useradd $user echo "after adding new user the current users are" grep '/home' /etc/passwd | cut -d: -f1 ;; 4) echo "current user are" grep '/home' /etc/passwd | cut -d: -f1 echo "enter the name of the user to delete" read user sudo userdel $user echo "after adding new user the current users are" grep '/home' /etc/passwd | cut -d: -f1 ;; 5) echo "enter the name of the group to add" read grpname sudo groupadd $grpname ;; 6) echo "enter the name of the group to delete" read grpname sudo groupdel $grpname echo "the $grpname has been deleted" ;; 7) echo "enter the name of the user for which the secondary group is to be added" read user echo "enter the group to which it is to be added" read groupname usermod -a -G $groupname $user echo "the group has been added, displaying the contents of the /etc/group" cat /etc/group ;; 8) echo "terminating script" exit ;; *) echo "Invalid choice, enter choice again" esac done
Output
[root@localhost
asgn3]# sh asgn3.sh
shell
script to create new user and modify access rights
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
3
current
user are
exam10
hduser
student
Enter the
name of the user to add
usernew
after
adding new user the current users are
exam10
hduser
hduser1
student
usernew
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
1
current
folder contents are
total 12
-rw-rw-r--.
1 student student 640 Aug 10 17:07 ab.cpp
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh~
enter the
name of the file for which you wish to change ownership
ab.cpp
enter the
name of the new owner
usernew
changed
ownership of `ab.cpp' from student to usernew
ownership
successfully changed
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
2
current
folder contains the following files
total 12
-rw-rw-r--.
1 usernew student 640 Aug 10 17:07 ab.cpp
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh~
enter the
name of the file for which access rights are to be changed
ab.cpp
enter
octal number for user rights
777
mode of
`ab.cpp' changed from 0664 (rw-rw-r--) to 0777 (rwxrwxrwx)
status of
folder after operation is as follows
total 12
-rwxrwxrwx.
1 usernew student 640 Aug 10 17:07 ab.cpp
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh
-rw-rw-r--.
1 student student 1979 Aug 12 15:24 asgn3.sh~
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
5
enter the
name of the group to add
groupnew
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
7
enter the
name of the user for which the secondary group is to be added
usernew
enter the
group to which it is to be added
groupnew
the group
has been added, displaying the contents of the /etc/group
root:x:0:
bin:x:1:
daemon:x:2:
sys:x:3:
adm:x:4:
tty:x:5:
disk:x:6:
lp:x:7:
mem:x:8:
kmem:x:9:
wheel:x:10:
mail:x:12:
uucp:x:14:
man:x:15:
games:x:20:
gopher:x:30:
video:x:39:
dip:x:40:
ftp:x:50:
slocate:x:21:
tcpdump:x:72:
ccache:x:988:
pulse:x:987:
pulse-access:x:986:
gdm:x:42:
stapusr:x:156:
stapsys:x:157:
stapdev:x:158:
exam10:x:1012:
tomcat:x:91:
hadoop:x:1015:
student:x:1017:
mega:x:1018:
usernew:x:1019:
groupnew:x:1020:usernew
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
4
current
user are
exam10
hduser
hduser1
student
usernew
enter the
name of the user to delete
usernew
after
adding new user the current users are
exam10
hduser
hduser1
student
Enter your
choice
1.Change
ownership 2.Change access rights 3.Add user 4.delete user 5.Add
group 6. Delete Group 7.Change group of user 8.exit
6
enter the
name of the group to delete
groupnew
the
groupnew has been deleted
8
terminating
script
[root@localhost
asgn3]#
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