The word 'ifconfig' stands for interface configuration. Ifconfig is used in Linux and Unix systems to debug, configure and manage network interfaces from the terminal. Using ifconfig command you can assign IP address and netmask, display network configuration (including broadcast [...]
UMASK in Linux and Unix systems 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 a new file or folder is created [...]
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 [...]
The gpasswd command is used in linux to remove user from group, add users to group, list group members and set password for a group. Gpasswd command alters '/etc/group' and '/etc/gshadow' files in Linux. In this tutorial we learn how [...]
Linux and other Unix-like Operating systems maintain 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. The regular files contain data [...]
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. [...]
Usually, when we talk of listing member of any unix group, let’s say, linux, then it really gets a bit complicated, there are number of ways to get the group members details as below 1. cat /etc/group 2. id [user_name] [...]
Fdisk is a text based utility used in Linux to manage disk partitions. Using fdisk you can view all disk partitions, create a new partition, delete an existing hard disk partition and view the size of the partition. Using fdisk [...]
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 [...]
Nmap (Network Mapper,) is a free and opensource security tool used for network scanning. Some of the main features of Nmap are scan for open ports, service discovery and security, and vulnerability auditing. Nmap is most commonly used via a [...]
When we talk of memory, then its the most misunderstood parameters of the whole system, especially, when we talk of Unix as a system This article mainly talks of simple tools that can be used to assess memory utilization by [...]
According to the manual page, shutting down a system means bringing the system down in a secure way or gracefully. The simplest Linux terminal command to power down a system is 'shutdown' command and it should work on Ubuntu and [...]
In this tutorial, we learn how to add a user to a group in Linux. We also check how to create a group, add to a user to a secondary group, change user primary group, remove group and list groups. [...]
User administration is an important task for system administrator. This article discusses how to create new users in Linux and how the login details of a user can be customized while adding the user. Adding User Only root user can [...]