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Category: Linux

How to Generate random number in Linux
Linux

Debian/Ubuntu Linux: bash: mail command not found – Solution

  • Gowri Shankar Balasubramaniam
  • Posted on August 15, 2020

In Linux operating system, the following error may occur when running mail command to access a mailbox, maildir, mail file:

Read More “Debian/Ubuntu Linux: bash: mail command not found – Solution”
How to Generate random number in Linux
Linux

How to Generate random number in Linux

  • Gowri Shankar Balasubramaniam
  • Posted on May 28, 2020

How to generate random number in Linux? You can easily generate random numbers with the custom limit range by using

Read More “How to Generate random number in Linux”
Ubuntu Clean up “No Longer Required Packages”
Linux

Delete / Remove User account in Linux – userdel

  • Gowri Shankar Balasubramaniam
  • Posted on May 25, 2020

How do I delete / remove user account from my server? How do I delete a user account under Linux

Read More “Delete / Remove User account in Linux – userdel”
Ubuntu upgrade / update package patch using apt-get install
Linux

How to disable apache modules? (a2dismod)

  • Gowri Shankar Balasubramaniam
  • Posted on May 19, 2020

How to disable apache modules? question is very common among system administrators. You can easily disable unwanted apache / apache2

Read More “How to disable apache modules? (a2dismod)”
Ubuntu upgrade / update package patch using apt-get install
Linux

How to remove / Uninstall postfix from Ubuntu

  • Gowri Shankar Balasubramaniam
  • Posted on May 13, 2020

Postfix is a free and open-source mail transfer agent that routes and delivers electronic mail. To remove postfix package completely

Read More “How to remove / Uninstall postfix from Ubuntu”
How to disable / deactivate user account in Samba server – smbpasswd
Linux

How to enable / disable / deactivate user account in Samba server – smbpasswd

  • Gowri Shankar Balasubramaniam
  • Posted on May 13, 2020

Samba server is a free software of Server Message Block networking protocol. Mainly used for sharing files and print services

Read More “How to enable / disable / deactivate user account in Samba server – smbpasswd”
Ubuntu upgrade / update package patch using apt-get install
Linux

PHP Fatal error: Call to undefined function imap_open() fix

  • Gowri Shankar Balasubramaniam
  • Posted on May 8, 2020

If you want to work with the IMAP protocol, as well as the NNTP, POP3 and local mailbox access methods, you must install the “php-imap”

Read More “PHP Fatal error: Call to undefined function imap_open() fix”
Linux

Linux finding largest files in directory recursively – find,sort,head

  • Gowri Shankar Balasubramaniam
  • Posted on April 20, 2020

Linux Find command is used to search and locate the list of files and directories based on conditions you specify

Read More “Linux finding largest files in directory recursively – find,sort,head”
Ubuntu Clean up “No Longer Required Packages”
Linux

Ubuntu Clean up “No Longer Required Packages”

  • Gowri Shankar Balasubramaniam
  • Posted on March 26, 2020

apt-get autoremove is the Linux command used to remove packages that were automatically installed to satisfy dependencies for other packages

Read More “Ubuntu Clean up “No Longer Required Packages””
Ubuntu upgrade / update package patch using apt-get install
Linux

Ubuntu upgrade / update package patch using apt-get install

  • Gowri Shankar Balasubramaniam
  • Posted on March 25, 2020

We often install the required packages in our system / server based on our requirements and needs. Packages are maintained

Read More “Ubuntu upgrade / update package patch using apt-get install”
Linux

List Available Package Updates (apt-get) in Ubuntu

  • Gowri Shankar Balasubramaniam
  • Posted on March 24, 2020

The Ubuntu Linux package manager has inbuilt tools to list the available updates for installed deb packages. There are different

Read More “List Available Package Updates (apt-get) in Ubuntu”
Linux

cal – How to get monthly and yearly calendar in Linux

  • Gowri Shankar Balasubramaniam
  • Posted on September 18, 2018

The “cal” command displays a simple calendar with Linux / UNIX date and time. If no argument passed, then the

Read More “cal – How to get monthly and yearly calendar in Linux”
Linux

ls -alt: How to list/get last modified files from current directory or any other specific directory in Linux

  • Gowri Shankar Balasubramaniam
  • Posted on June 26, 2018

The ls command lists the contents of, and optional information about, directories and files. ls without option lists the files

Read More “ls -alt: How to list/get last modified files from current directory or any other specific directory in Linux”
Apache HTTP Server
Linux

How to verify configured virtual hosts in apache: apache2ctl – Apache HTTP Server Control Interface

  • Gowri Shankar Balasubramaniam
  • Posted on May 26, 2018

Creating virtual host configurations on your Apache server does not magically cause DNS entries to be created for those host

Read More “How to verify configured virtual hosts in apache: apache2ctl – Apache HTTP Server Control Interface”
Open suse linux
Linux

How to create new user account with home directory in Open SUSE Linux

  • Gowri Shankar Balasubramaniam
  • Posted on May 23, 2018

To create a new user account in Open suse, please use the below command. # useradd -g usergroup -p testpwd

Read More “How to create new user account with home directory in Open SUSE Linux”

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