Reboot your brain :2.0 Linux Basic tasks

Linux Kernel Assignment : 

Problem #1     Block System call : 

• block system call for date command 
• that means you don't have to uninstall date command but if you run kernel must not accept 
• do the same Firefox as well

Problem #2 :  play with directory 

•   create a directory without name from command line
•   create a directory with name "-okgoogle"

Problem #3 :  create a directory structure 


Note :   You are only allowed to use a single command and only one time

Problem #4.  share and files and folder 

•  create two users name jack and Jill  from command line
• create all the data under home directory of each users 
• login with jack user and create a file name  jack.txt using vim editor and write "hello jack"
• from jack user also create two directories name jack1 & jack2 
• now login from Jill user and create a file. Jill.txt using vim editor and write "hey jiil"
• from Jill also create two directoires named jill1 & jill2 

Important :  swap these files and directories in between users  and to swap don't use root account.


Problem #5 :  play with files and directories 

•   create  3 files named   abc.txt  ok  fine  g.txt  /tmp directory 
•   create  4  directories   aa aaa aaaa  under  /tmp directory 
•   give ls command to  list the content of  /tmp directory 
•   make sure it will only list the content (file|directory)  having 2 char in their name.

 

problem #6:  run command without any output 

•   open terminal and type any command 
•   once you press enter your output of given command must not  print
•    you are not allowed to redirect output anywhere 

problem #7 :    create a shell script 

•  create a shell script named /root/delvex.sh 
•   make sure it will run /bin/sh shell 
•   a user will be running this script my using a command name opensource
•  when a user  run like  "opensource  time" it must give current time only
• when it runs like "opensource user"  it will give list of interactive shell users only
•  when run like "opensource 100"  it must print "Hello Delvex" 100 times in interval of 1 sec
• if runs like  "opensource windows"  then it must shutdown OS
• if run opensource command without any parameter  then it must show out --

             i)   name of kernel 

             ii)   version of kernel 

             iii)  current date in the format of  /DD/MM/YY

             iv)  name of OS 

             v)   last reboot time 

 

 Note:    each output for last option must be in a separate line   

Problem #8:    create a user will default settings

 

•   create a user name  delvex  and password of this user will be fedora
•   when user got created below listed things will come by default
•   history size will be 5000 
•   history file will be  /home/delvex/myhist.txt
•   default shell will be  /bin/sh