setgid Permission
When setgid permission is applied to a directory, files that were created in this directory belong to the group to which the directory belongs. How to set the setgid permission chmod g+s directory How to … Read more
Category : System Administration
Sticky bit Permissions
What are sticky bit? Files located in a directory with the sticky bit set can only be deleted or renames by the owner of the file or by the root user. How to set Sticky … Read more
Changing the Cron Subject Line Email Output (Ubuntu)
Instead of using the default MAILTO of the cron file you can use the mail program installed on your server to send the email with a custom “Subject Line”. 10 1 * * * /var/myscript.sh … Read more
Crontab Visual Format
* * * * * * | | | | | | | | | | | +– Year (range: 1900-3000) | | | | +—- Day of the Week (range: 1-7, 1 standing for … Read more
Clean up Your Boot Partition Ubuntu
If you constantly run out of space in the boot partition, you might need to run the following command to cleanup the boot partition. First, list all installed kernels dpkg -l linux-image-* | grep ii … Read more