Sticky Bit: User Ownership access-right Flag in Unix

Sticky bit is a bit set in permission of a file or directory to give special access –rights to user. When we set the sticky bit for any executable file, it will remain in swap space after the process exited. It will help to reduce time of execution in repeatedly used programs. So, we can set this sticky bit for frequently used programs like editors, commands etc. So, execution of them will be faster as compared to without sticky bit. Main important use of sticky bit is on directory, when we set sticky bit for directory then files reside in...

SetUID, SetGID bit : Special Permission in Linux

Sticky bit concept and implementation                                      Check CPU usage of file system SetUID: SetUID is a set User ID upon execution. We can identify SetUID bit is set or not in permissions of file by long listing the details of file as below. [linuxconcepts@localhost test]$ cat > setuid.sh #!/bin/sh echo "SET USER ID BIT"; date [linuxconcepts@localhost test]$ [linuxconcepts@localhost test]$ ls -l setuid.sh -rw-rw-r--....

Graphics/Image Editing open source applications in Linux

Mostly Asked interview questions                                             How to recover delete files in linux There are many open source applications in Linux available for graphic designer or image editing purpose.  Some of them, I have mentioned below and I will come with detailed description about them in later articles....

Most Asked Question : Unix Interview questions and answers

Advanced use of sed command                                                    useful tricks of sed command UNIX is an open source operating system. It is a multiuser, multitasking operating system and developed in 1969 at AT & T’s laboratory. First, it was developed in assembly language but later it was recoded in ‘C’ language when this language developed by Dennis Ritchie. Actually, Unix is not an operating...

Blkid command in Linux

Interview Questions for Linux Administrator                                             Linux Commands & Tools  There are many devices or mount points mounted on system. But sometimes, we need to mount these mount points by unique ID. This case generally happens in network because in same network, might have same name mount points on different disks. To avoid this conflict, we will mount the mount points by their block...

How to add shell in Linux : Add-shell command

VI Editor                                                                                                   Useradd Command in Linux There are many shells which are not coming by default in our operating system. So, that time we need to install it externally by downloading rpm package for Linux,...

VI Editor : Text Editor in Linux

Crontab in Linux                                                                            Steps to create Logical Volume Vi editor works as text editor in Linux. We can create, modify, search and replace patterns in a file like these multiple operations, we can do using vi editor. Vi and vim editors are almost same commands but vim is having many...

Top 10 basic linux commands for beginners

Check CPU usage in Linux                                           Interview Questions for Linux Administrator There are many commands which needed to know beginner of Unix OS. But it is not possible to understand all commands in one day. If you really new to Linux then please go through this article and understand the most used commands in Linux. If you are new to Linux then, you will need to know, how to create directory, how to...