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À partir d’avant-hiernixCraft

Helios64 Arm-Based Linux NAS announced

Par : Vivek Gite

Helios64 is an upgraded version Helios4 of ARM-based NAS SBC (Single-board computer) for Linux. This NAS (Network Attached Storage) comes with 5 SATA 3.0 port, M.2 sata slot, LPDDR 4 ram, and hexacore SoC. Let us see some details about the Helios64 Arm-Based Linux NAS SBC, including pricing and hardware specs information.

The post Helios64 Arm-Based Linux NAS announced appeared first on nixCraft.

Linux rpm List Installed Packages Command

Par : Vivek Gite

How do I list all installed packages using rpm command on CentOS/Suse/Fedora/RHEL/Scientific and Red Hat Enterprise Linux? Can you tell me the Linux command to list all rpm's installed on the server?

The post Linux rpm List Installed Packages Command appeared first on nixCraft.

Linux Find Out Maximum RAM Supported By Server / BIOS

Par : Vivek Gite

How do I find out the maximum RAM supported by the Dell, HP, IBM, Oracle/Sun or Intel/AMD server on a Linux or Unix-like operating systems without rebooting the server or opening the server case (chassis)? How can I find find out maximum RAM supported by the Server BIOS and motherboard in Linux?

The post Linux Find Out Maximum RAM Supported By Server / BIOS appeared first on nixCraft.

How to configure Nginx with Let’s Encrypt on CentOS 8

Par : Vivek Gite

How do I secure my Nginx web server with Let's Encrypt free ssl certificate on my CentOS 8 server? How to set up and configure Nginx with Let's Encrypt on CentOS 8?

The post How to configure Nginx with Let’s Encrypt on CentOS 8 appeared first on nixCraft.

Linux exit from lxc-console keyboard shortcut

Par : Vivek Gite

I am using Debian Linux server with Linux Containers (lxc). How do I disconnect and exit from an lxc-console to a shell prompt without closing ssh session?

The post Linux exit from lxc-console keyboard shortcut appeared first on nixCraft.

Ubuntu Linux Change Hostname (computer name)

Par : Vivek Gite

How do I change the Ubuntu computer name from 'ubuntu' to 'AvlinStar'? Can you tell me more about Ubuntu Linux change hostname command?

The post Ubuntu Linux Change Hostname (computer name) appeared first on nixCraft.

How to upgrade Alpine Linux 3.15 to 3.16

Par : Vivek Gite

{Updated} Alpine Linux 3.16.0 has been released. Here is how to upgrade from version 3.15.xx to 3.16.0.
The post How to upgrade Alpine Linux 3.15 to 3.16 appeared first on nixCraft.

How to remove grep command while grepping using ps command

Par : Vivek Gite

{Updated} We all use ps | grep foo combo to find and narrow down a running process on Linux and Unix-like systems. However, this results in an annoying problem where the grep command also appears in their own grepping result. Let us see how to exclude or hide grep from ps results.

The post How to remove grep command while grepping using ps command appeared first on nixCraft.

Kubuntu Linux Focus Laptop Announced

Par : Vivek Gite

Kubuntu is a free and open-source version based upon Ubuntu Linux. Kubuntu flavor uses KDE instead of GNOME desktop. Now, the Kubuntu project announced the first authorized laptop called Kubuntu Focus in collaboration with MindShareManagement Inc, and Tuxedo Computers. Let us see technical specs and other information.

The post Kubuntu Linux Focus Laptop Announced appeared first on nixCraft.

Grep From Files and Display the File Name On Linux or Unix System

Par : Vivek Gite

How do I grep from a number of files and display the file name only? How do I force the grep command to display the filename before the matching lines in its output?

The post Grep From Files and Display the File Name On Linux or Unix System appeared first on nixCraft.

Remove Santa Hat in VLC Player Permanently

Par : Vivek Gite

How do I remove Santa Hat in VLC media player that displayed during Christmas time during 18th December to 1st January?

The post Remove Santa Hat in VLC Player Permanently appeared first on nixCraft.

Python Get Today's Current Date and Time

Par : Vivek Gite

How do I find out the current date and time in Python? What is the module or function I need to use to get current time or date in Python programming language? How can I get today's date and current date and time in Python in different formats using strftime() method?

The post Python Get Today's Current Date and Time appeared first on nixCraft.

CentOS 8 update installed packages for security

Par : Vivek Gite

I need to update installed packages for security on CentOS 8.x (CentOS Enterprise Linux) server. How can I update my CentOS 8.x system using yum command?

The post CentOS 8 update installed packages for security appeared first on nixCraft.

How to install tar on RHEL/CentOS 6/7/8 using yum

Par : Vivek Gite

I am trying to extract a file using 'tar xvf file.tar.gz' syntax, but I am getting an error:
bash: tar: command not found
How do I fix this problem? How can I install tar on a CentOS/RHEL version 8, 7 or 6 desktop using yum command?

The post How to install tar on RHEL/CentOS 6/7/8 using yum appeared first on nixCraft.

How to Install PHP 7.x on CentOS 8 For Nginx

Par : Vivek Gite

How do I install PHP 7.x on CentOS 8 Linux server along with Nginx? How can I install the latest version of PHP 7.4 on CentOS Enterprise Linux 8 server?

The post How to Install PHP 7.x on CentOS 8 For Nginx appeared first on nixCraft.

killersheep – Silly game for Vim version 8.2

Par : Vivek Gite

Vim is my favorite text editor and version 8.2 released. The new version includes support for popup windows and text properties. Popup windows can be used for many purposes. For example, a list of choices can be displayed, where the user selects an entry with keys or with the mouse. There is also a new vim game released named as killersheep to show you new capabilities of Vim. Let us see how to install and play killersheep.
killersheep - Silly game for vim version 8.2

The post killersheep – Silly game for Vim version 8.2 appeared first on nixCraft.

Gracefully Restart Nginx Web Server After Changes Made In a Config File

Par : Vivek Gite

I know how to gracefully restart Apache web server under Unix like operating system. I made changes to nginx.conf. How do I gracefully restart Nginx web server? How do I make changes in a Nginx server config file to take effect without restarting the Nginx server itself without interrupting users' current session?

The post Gracefully Restart Nginx Web Server After Changes Made In a Config File appeared first on nixCraft.

How to install htop on OpenSUSE Linux using zypper

Par : Vivek Gite

I am a new sysadmin of OpenSUSE Linux operating system. How do I install htop on OpenSUSE using the zypper command?

The post How to install htop on OpenSUSE Linux using zypper appeared first on nixCraft.

Linux check the physical health of a USB stick [ Flash drive ]

Par : Vivek Gite

How do I check the physical health of a USB stick in Linux operating systems? How do I check USB flash drive in Linux? Can you tell me Linux command to test and detect bad sector in USB flash memory or pen drives?

The post Linux check the physical health of a USB stick [ Flash drive ] appeared first on nixCraft.

BASH Shell Test If a File Is Writable or Not

Par : Vivek Gite

How can you test if a file is writable under UNIX / Linux bash shell scripting and programming language?

The post BASH Shell Test If a File Is Writable or Not appeared first on nixCraft.

How to see Time-To-Live (TTL) for a DNS record

Par : Vivek Gite

How do I see Time-To-Live (TTL) for a DNS record using Linux, macOS, *BSD, or Unix-like systems command line option? How do I find my DNS TTL?

The post How to see Time-To-Live (TTL) for a DNS record appeared first on nixCraft.

How to test and validate DNSSEC using dig command line

Par : Vivek Gite

How do I test and validate DNSSEC using the dig command line under Linux, macOS, *BSD, and Unix-like systems?

The post How to test and validate DNSSEC using dig command line appeared first on nixCraft.

How to add bash auto completion in CentOS 8 Linux

Par : Vivek Gite

I set up a new cloud server, but my auto-completion of bash shell commands are not working. How do I enable autocomplete feature in CentOS 8 (CentOS Enterprise Linux 8)? How do I write simple bash completion code in CentOS 8?

The post How to add bash auto completion in CentOS 8 Linux appeared first on nixCraft.

How to set rsync speed limit from eating all bandwidth

Par : Vivek Gite

The rsync command is eating all my bandwidth from a backup script and generating tons of I/O. How do I set a limit for file transfer speed of rsync command on Linux or Unix-like system? How can I keep my rsync script from using all of my bandwidth?

The post How to set rsync speed limit from eating all bandwidth with -bwlimit option appeared first on nixCraft.

How to set rsync speed limit from eating all bandwidth

Par : Vivek Gite

The rsync command is eating all my bandwidth from a backup script and generating tons of I/O. How do I set a limit for file transfer speed of rsync command on Linux or Unix-like system? How can I keep my rsync script from using all of my bandwidth?

The post How to set rsync speed limit from eating all bandwidth with -bwlimit option appeared first on nixCraft.

How To Set up OpenVPN Server In 5 Minutes on Ubuntu Linux

Par : Vivek Gite

{Updated} I am a new Ubuntu Linux server user. How do I setup an OpenVPN Server on Ubuntu Linux version 18.04/20.04 LTS or 20.10 server to shield my browsing activity from bad guys on public Wi-Fi, and more?

The post How To Set up OpenVPN Server In 5 Minutes on Ubuntu Linux appeared first on nixCraft.

Add / Create a Sudo User on CentOS Linux 8

Par : Vivek Gite

How do I add / create a sudo user on CentOS Linux 8 using the command line?

The post Add / Create a Sudo User on CentOS Linux 8 appeared first on nixCraft.

Vi / Vim Save And Quit The Editor Command

Par : Vivek Gite

{Updated} I am a new vi / vim text editor user. How do I quit the vi editor and save my changes under a Linux or Unix like operating systems? Can you tell me command to save and quit file in vim?

The post Vi / Vim Save And Quit The Editor Command appeared first on nixCraft.

Understanding /etc/passwd File Format

Par : Vivek Gite

Can you explain /etc/passwd file format for Linux and Unix-like operating systems?

The post Understanding /etc/passwd File Format appeared first on nixCraft.

How to install and use Nginx on OpenSUSE Linux server

Par : Vivek Gite

How do I install and configure the latest version of Nginx web server on OpenSUSE Linux server using the CLI and host a static site?

The post How to install and use Nginx on OpenSUSE Linux server appeared first on nixCraft.

How to add or mount directory in LXD (Linux container)

Par : Vivek Gite

I have two LXD containers running. One is for Nginx, and another is for processing data. I need to share data between two containers. How do I add or mount a shared directory between two?

The post How to add or mount directory in LXD (Linux container) appeared first on nixCraft.

Debian / Ubuntu Linux Delete Old Kernel Images Command

Par : Vivek Gite

I am a new Ubuntu Linux user and noticed that old kernel still exists in my system. Why doesn't Ubuntu remove old kernels automatically? How do I delete old unused kernel images to free disk space. How to remove unused old kernel images on Ubuntu Linux safely?

The post Debian / Ubuntu Linux Delete Old Kernel Images Command appeared first on nixCraft.

How to set up a firewall using FirewallD on OpenSUSE Linux

Par : Vivek Gite

I am a new OpenSUSE Linux 15.x sysadmin. How do I set up a firewall using FirwallD on OpenSUSE Linux 15.1?

The post How to set up a firewall using FirewallD on OpenSUSE Linux appeared first on nixCraft.

How to generate RSS 2.0 feed quickly using Python

Par : Vivek Gite

I wanted to generate RSS 2.0 feeds in Python. Nothing fancy but for certain tasks I needed it something that is quick and just works out of the box. I found rfeed. It is a library to generate RSS 2.0 feeds in Python. It is in my opinion straightforward to use. This post explains how to generate RSS 2.0 feed quickly using Python.

The post How to generate RSS 2.0 feed quickly using Python appeared first on nixCraft.

How to check and list installed packages in CentOS Linux

Par : Vivek Gite

How do I check installed packages in CentOS Linux version 6.x/7.x/8.x? How can I List installed packages on CentOS Enterprise Linux server?

The post How to check and list installed packages in CentOS Linux appeared first on nixCraft.

Linux Change or Rename User Name and UID

Par : Vivek Gite

{Updated} How do I change user name (rename user name) or UID under a Linux operating system using command line tools? How do I change or rename username in Linux?

The post Linux Change or Rename User Name and UID appeared first on nixCraft.

Bash Assign Output of Shell Command To Variable

Par : Vivek Gite

How do I assign the output of a shell command to a shell variable under Unix like operating system? For example, I want to store the date command output to a variable called $now. How do you do that? How can I set a variable to the output of a command in Bash?

The post Bash Assign Output of Shell Command To Variable appeared first on nixCraft.

Linux shell script to reduce PDF file size

Par : Vivek Gite
Here is a handy and useful Linux and Unix shell script that reduce PDF file size using Ghostscript. No need to upload your PDF file to the shady third-party website. Just do it from the terminal. I tested it with both CentOS and Ubuntu/Debian Linux.

Bash check if process is running or not on Linux / Unix

Par : Vivek Gite

I am new to Linux shell scripting. I am using a CentOS 7 Linux and Ubuntu 18.04 LTS server in the cloud. How do I check if a process is running or not on Linux? How do I determine whether a process is running or not in a shell script running on an Ubuntu server?

The post Bash check if process is running or not on Linux / Unix appeared first on nixCraft.

How to install and use Nginx on CentOS 8

Par : Vivek Gite

How do I Install Nginx on CentOS 8 Linux server? How can configure the latest version of Nginx web server on a CentOS Enterprise Linux 8 server using the CLI and host a static site?

The post How to install and use Nginx on CentOS 8 appeared first on nixCraft.

How to Create a new user account in CentOS 7/8

Par : Vivek Gite

How do I create a new user account on CentOS 7/8 Linux server using command-line options? How do I create a new user account with sudo access on CentOS 8 Linux server?

The post How to Create a new user account in CentOS 7/8 appeared first on nixCraft.

FreeBSD Find Out All Installed Hard Disk Size Information

Par : Vivek Gite

How do I find out all installed hard disk drive names under a FreeBSD operating system without rebooting the server? How do I use the equivalent of fdisk -l in Linux, with FreeBSD to list all hard disks drives? How can I find hard disk size in FreeBSD?

The post FreeBSD Find Out All Installed Hard Disk Size Information appeared first on nixCraft.

How to delete empty lines using sed command under Linux / UNIX

Par : Vivek Gite

Ineed to delete all empty lines but could not figure out sed command for the same. How do I delete all empty lines with sed under Linux or Unix-like systems?

The post How to delete empty lines using sed command under Linux / UNIX appeared first on nixCraft.

How to install htop on CentOS Linux 8

Par : Vivek Gite

I am a new user of CentOS Linux 8 operating system. How do I install htop on CentOS 8 using the yum command?

The post How to install htop on CentOS Linux 8 appeared first on nixCraft.

Linux prevent unprivileged users from viewing dmesg command outputs

Par : Vivek Gite

I want to restrict both normal users and root user inside LXD container 'hypervisor' from viewing and using dmesg command output. How do I prevent non-root (unprivileged) Linux users from viewing the Linux kernel's log buffer? Can Linux prevent unprivileged users from viewing dmesg command output?

The post Linux prevent unprivileged users from viewing dmesg command outputs appeared first on nixCraft.

How to return pid of a last command in Linux / Unix

Par : Vivek Gite

I need to find and return the PID of the last command executed in Linux. How do I return the PID of command in Linux?

The post How to return pid of a last command in Linux / Unix appeared first on nixCraft.

RHEL / Centos Linux Disable Firewall Command

Par : Vivek Gite

How do I disable firewall on CentOS or Red Hat Enterprise Linux server version 5.x/6.x running on my HP micro server?

The post RHEL / Centos Linux Disable Firewall Command appeared first on nixCraft.

Linux Check User Password Expiration Date and Time

Par : Vivek Gite

How do I check the user account password expiry information on Linux? How do I check users password expiry information under Linux operating systems?

The post Linux Check User Password Expiration Date and Time appeared first on nixCraft.
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