Sticky Bit is mainly used on folders in order to avoid deletion of a folder and it’s content by other users though they having write permissions on the folder contents. If Sticky bit is enabled on a folder, the folder contents are deleted by only owner who created them and the root user.
Category: Linux
Linux Files and Directories Permissions
Each file and directory has three user based permission groups: Owner/User (u)- The Owner permissions apply only the owner of the file or directory, they will not impact the actions of other users. Group (g)- The Group permissions apply only to the group that has been assigned to the file or directory, they will not
Linux Users and Groups
The control of users and groups is a core element of Red Hat Enterprise Linux system administration. Users can be either people (meaning accounts tied to physical users) or accounts which exist for specific applications to use. Groups are logical expressions of organization, tying users together for a common purpose. Users within a group can
CentOS RedHat 7.x Root Password Reset
Root user is the most powerful user in Linux systems , What if we lost Root Password for any reason and we need to do some troubleshooting or maintenance , you would need root privileges , so you must be able to retain Root Password , Let’s see how to do it ….
Linux Time Synchronization with chrony
Time sync became a critical part of modern system and security behaviors , ssl certificates based systems will not even work without correct timing and logging will not be helpful if it didn’t record the correct time when things happen , as all servers and PCs on your organization needs time sync , so it
Linux Automated tasks with cron
Cron is a daemon that can be used to schedule the execution of recurring tasks according to a combination of the time, day of the month, month, day of the week, and week. Cron assumes that the system is on continuously. If the system is not on when a task is scheduled, it is not
Linux scheduling jobs with at and batch
The at command is used to schedule a one-time task at a specific time. batch command is used to schedule a one-time task to be executed when the systems load average drops below 0.8.
CentOS / Red Hat Maria Database (mysql)
MariaDB is one of the most popular database servers. Made by the original developers of MySQL. Guaranteed to stay open source.
CentOS/Red Hat/Ubuntu Linux SSH Secure Remote Login
01. What is SSH: SSH, also known as Secure Socket Shell, is a network protocol that provides administrators with a secure way to access a remote computer. SSH also refers to the suite of utilities that implement the protocol. Secure Shell provides strong authentication and secure encrypted data communications between two computers connecting over an
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CentOS Linux Centralized Logging Server
As Linux Admin you may need an easy solution to keep track of log files in many servers from central location and save it centrally , and it is easy in Linux , Let’s do it ..