This article I am trying to explain how to deal with "Input/output error " when you initiate any commands in Linux. I have pointed out some examples that report a similar error. # du -bash: /usr/bin/du: Input/output error # mkdir [...]
Bobbin Zachariah
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/etc/shadow File in Linux Explained
In this tutorial, we will understand how the file /etc/shadow formated and why it is used for. The file /etc/shadow can be read-only by the system user ‘root’. In Linux, when you create a user (using useradd command) the account [...]
9:50 pm
/etc/passwd File in Linux Explained
On Linux systems, user account information such as username, User ID (UID), Group ID (GID), home directory and shell are kept in a plain text file called /etc/passwd. When a user is created, system files such as /etc/passwd, /etc/shadow and [...]
6:04 pm
Mdadm - Configure Software Raid in Linux
In this tutorial, we will go through the Mdadm configuration of RAID 5 using 3 disks in Linux. I assume that you have 3 disks /dev/sda, /dev/sdb and /dev/sdc which you want to use in RAID 5. Each disk is [...]
9:35 pm
Linux runuser command - Run Shell with Specified User/Group ID
The runuser command is used to run a shell with specified user and group ID. This command changes the user and group id's. When you want to run some commands as some other user, this command can be used to [...]
10:31 am
Install and Update Redhat Kernel RPM
Kernel is the central component of an Operating System that is responsible for memory, process, and task and disk management. The first thing you need to think about updating a kernel is that “why do you need a kernel update”. [...]
8:52 pm
How to Change Volume Label of USB Drives on Linux
When a USB device such as USB hard drives, flash memory card is connected to a Linux machine, it will get automatically mounted at /media/disk, /media/disk1 etc. It will be useful if we can label it with an identifiable name, [...]
8:18 pm
How to use su Command in Linux
In this tutorial we learn what is su command (switch user) in Unix/Linux and the difference between su and su - commands. Linux is a multiuser operating system kernel which means multiple users can log in to a Linux system [...]
7:29 pm
How to Check NFS Version from Linux Command Line
Network File System (NFS) is a distributed file system protocol that allows a user on a system (client) to access files over a network in a manner similar to how local storage is accessed. In one of our earlier tutorials, [...]
7:17 pm
How to Mount SMB Share on Linux
SMB is a protocol used by Windows-based computers for sharing access to resources on a network. To mount SMB share, Linux kernel now supports SMB3 by default (SMB3.1.1/SMB3.02/SMB3/SMB2.1 dialects are requested by default). CIFS is a particular implementation of the [...]
10:38 pm
Linux NFS Mount Entry in fstab ( /etc/fstab ) with Example
NFS stands for ‘Network File System’. This mechanism allows unix machines to share files and directories over the network. Using this feature, a Linux machine can mount a remote directory (residing in a NFS server machine) just like a local [...]
8:48 pm
Fstab File ( /etc/fstab ) Entry Options in Linux
The ‘/etc/fstab’ file is one of the important configuration file used by Linux machines which specify the devices and partitions available and where/how to use these partitions. This file will be created/updated during the system installation. You need to modify [...]
7:58 pm
How to Add User to Sudoers in Linux
Sudo access allows a user to execute all permitted commands as root or as any other user. Once the sudo access is given to a specific user in sudoers file, that user can execute the commands as root by executing [...]
9:06 pm
Sar Command in Linux with Examples
Sar command is used to produce statistical reports on a variety of resources including CPU usage, memory utilization, I/O devices consumption, network monitor, swap, and load averages. SAR stands for System Activity Reporter, very useful tools for any Linux administrator [...]
8:53 pm