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Lab 009: Linux File Permissions

Lab 009: Linux File Permissions

Requirements​

There are new requirements to automate a backup process that was performed manually by the xFusionCorp Industries system admins team earlier. To automate this task, the team has developed a new bash script xfusioncorp.sh. They have already copied the script on all required servers, however they did not make it executable on one the app server i.e App Server 1 in Stratos Datacenter.

Please give executable permissions to /tmp/xfusioncorp.sh script on App Server 1. Also make sure every user can execute it.

Note

This lab demonstrates managing file permissions using chmod and understanding permission bits.

Prerequisites​

  • SSH access to App Server 1 with root or sudo privileges.
  • Script /tmp/xfusioncorp.sh exists.
  • chmod command available.

Steps​

Login to the app server and switch to root. For the server credentials, check out the Project Nautilus documentation.

sshpass -p  '*****' ssh -o StrictHostKeyChecking=no tony@172.16.238.10
sudo su -
*****  
[root@stapp01 ~]# ls -ltr /tmp/xfusioncorp.sh
---------- 1 root root 40 Jul 26 17:04 /tmp/xfusioncorp.sh
[root@stapp01 ~]# 
[root@stapp01 ~]# chmod o+rx /tmp/xfusioncorp.sh
[root@stapp01 ~]# 
[root@stapp01 ~]# ls -ltr /tmp/xfusioncorp.sh
-------r-x 1 root root 40 Jul 26 17:04 /tmp/xfusioncorp.sh
[root@stapp01 ~]# 
[root@stapp01 ~]# exit
logout
[tony@stapp01 ~]$ 
[tony@stapp01 ~]$ /tmp/xfusioncorp.sh 
Welcome To KodeKloud

Verification​

  • Confirm permissions are set to allow execute with ls -l /tmp/xfusioncorp.sh.
  • Confirm every user can execute it (output shows -rwxr-xr-x or similar).
  • Test execution as different user: su - tony -c "/tmp/xfusioncorp.sh".
  • Verify script outputs "Welcome To KodeKloud".

Resources​