This category covers topics including various linux command line utilities and its uses.

What is Umask in Linux

UMASK in Linux is actually known as User Mask or it is also called User File creation MASK. This is a kind of base permission or default permission given when new file or folder is created in Linux box. Most [...]

Bobbin Zachariah 9:31 am

Linux Word Count wc Command With Example

The wc command (as defined in the man page) print newline, word, and byte counts for each file, and a total line if more than one file is specified. Wc is widely used in bash shell scripting. Shell scripting is [...]

Bobbin Zachariah 9:30 am

Manage Linux Group Using gpasswd Command

Linux tail command

The gpasswd command (As defined in the man page) is used to administer /etc/group, and /etc/gshadow. Every group can have administrators, members and a password. Command Options -a, --add user Add the user to the named group. -d, --delete user [...]

Bobbin Zachariah 9:00 am

Detailed Understanding of Linux Inodes with Example

Everything is a file, Linux and other Unix-like Operating systems maintain a consistency by treating everything as a file (even the hardware devices). The keyboard, mouse, printers, monitor, hard disk, processes, even the directories are treated as files in Linux. [...]

Bobbin Zachariah 9:21 am

How to Limit Process at User Level on Linux

Ulimit  - as the name signifies, its the user resource limits defined by users for their respective processes, it provides control over the resources available to the shell and to processes started by it, on systems that allow such control. [...]

Bobbin Zachariah 12:33 pm

Fdisk Commands - Manage Partitions in Linux

On Linux distributions, fdisk is the best tool to manage disk partitions. fdisk is a text based utility. Using fdisk you can create a new partition, delete an existing partition, or change existing partition. Using fdisk you are allowed to [...]

Bobbin Zachariah 4:32 pm

How to Check Page Faults in Linux

Virtual memory is the concept when we realize the memory used more than physical memory. The big issue with virtual memory is page fault. The basic transfer unit is a fixed length block of data called page. When a process [...]

Raghu 7:37 pm

Nmap Commands with Examples

Nmap ("Network Mapper") is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or [...]

Bobbin Zachariah 8:00 am

Linux Memory Analysis with Free and Pmap Command

When we talk of memory, then its the most misunderstood parameters of the whole system,especially, when we talk of Unix as a system, its memory workflow is again different from Linux and so Unix memory management is out of scope [...]

Bobbin Zachariah 1:31 am

4 Commands to Shutdown Linux from Terminal

How can you shut down your system successfully using a command? According to the manual page of shutdown command, shutting down a system means bringing the system down in a secure way. This article discusses the commands you can use [...]

Bobbin Zachariah 11:22 pm

How to Add a User to a Group in Linux

This article is about adding a user to a group but now the question is why a user joins a group and how we can do it. This can be associating a user to a new group or may be [...]

Raghu 12:20 am

How to Change Password in Linux

In this article, I will explain how a user can change password for his/her account on Linux. Passwd command will work all Linux distros like Redhat, Centos, Ubuntu, Debian, Fedora etc. Let's discuss Linux version of passwd command with some [...]

Bobbin Zachariah 9:56 pm