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Linux/Unix: pstree Command Examples: See A Tree Of Processes

nixCraft - Fri, 01/16/2026 - 06:35
I am a new Linux user. How do I display the process on the Linux based server or desktop/laptop in easy to read tree format using bash shell prompt? Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post Linux/Unix: pstree Command Examples: See A Tree Of Processes appeared first on nixCraft. 2024-05-12T19:29:49Z 2024-05-12T19:29:49Z Vivek Gite

How to enable Debian 12 Backports repository

nixCraft - Fri, 01/16/2026 - 06:35
The Debian Linux 12 backports repository offers updated versions of software packages for Debian Stable releases. These packages are sourced from Testing (and sometimes Unstable) branches of Debian, and then optimized and recompiled to function on the current Stable release, such as Bookworm. Let us see how to install and use Debian Linux 12 "Bookworm" Backports repository. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to enable Debian 12 Backports repository appeared first on nixCraft. 2024-05-11T11:02:39Z 2024-05-11T11:02:39Z Vivek Gite

How to copy permissions from one file to another on Linux

nixCraft - Fri, 01/16/2026 - 06:35
I need to copy or clone file ownership and permissions from another file on Linux. Is there a bash command line option to clone the user, group ownership and permissions on a file from another file on Linux operating system? Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to copy permissions from one file to another on Linux appeared first on nixCraft. 2024-05-08T22:06:06Z 2024-05-08T22:06:06Z Vivek Gite

A Bash Script to Read All Command Line Arguments into an Array: Simplify Argument Handling

nixCraft - Fri, 01/16/2026 - 06:35
If you are writing a Bash shell script, you should read command-line arguments into an array for some time. This allows us to process any number of arguments provided when the script is run. This makes the script adaptable to different use cases. Instead of dealing with fixed variables like $1, $2, $3, etc., you can work with any number of arguments more dynamically using bash for loop or bash while loop, depending upon your needs. Arrays make it simple to loop through each argument and perform operations on them, whether basic printing or complex processing. Bash provides a mapfile (readarray command) internal built-in command to read lines from a file into an array variable. Let us see how to use mapfile to read all command line arguments into an array. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post A Bash Script to Read All Command Line Arguments into an Array: Simplify Argument Handling appeared first on nixCraft. 2024-05-07T10:40:08Z 2024-05-07T10:40:08Z Vivek Gite

How to Pin Versions in Yum or Dnf for RHEL or CentOS Linux

nixCraft - Fri, 01/16/2026 - 06:35
CentOS, RHEL (Red Hat Enterprise Linux), Fedora and other clones of RHEL, such as Oracle, Alma, and Rocky, offer support for version pinning. This feature allows developers and system administrators to lock a particular package to a specific version, preventing it from being automatically updated by yum or dnf commands. Sometimes, it is necessary to protect packages from being updated to newer versions to avoid incompatibility issues with your applications. For example, you can lock down PHP version 8.3.6 and avoid using updated PHP version 8.4. Let us see how to lock a package to a specific version, only exclude a package from yum update or dnf update on a CentOS, RHEL, Fedora, and friends. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to Pin Versions in Yum or Dnf for RHEL or CentOS Linux appeared first on nixCraft. 2024-05-07T09:01:47Z 2024-05-07T09:01:47Z Vivek Gite

How to perform find and replace operations within a visual selection in Vim

nixCraft - Fri, 01/16/2026 - 06:35
Here's a quick tip for vim users. You can perform find and replace operations within a visual selection in Vim for text or code block. Visual selection for finding and replacing text in Vim allows developers and Linux/Unix users precise and efficient text editing. It's handy when you want to change specific portions of text or code blocks within a larger file without affecting other occurrences. This method required to minimizing manual search and reducing the risk of unintended code or text modifications. Let us see how to find and replace in Vim visual mode selection. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to perform find and replace operations within a visual selection in Vim appeared first on nixCraft. 2024-05-07T06:14:33Z 2024-05-07T06:14:33Z Vivek Gite

How to find hidden processes and ports on Linux/Unix/Windows

nixCraft - Fri, 01/16/2026 - 06:35
Unhide is a little handy forensic tool to find hidden processes and TCP/UDP ports by rootkits / LKMs or by another hidden technique. This tool works under Linux, Unix-like system, and MS-Windows operating systems. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to find hidden processes and ports on Linux/Unix/Windows appeared first on nixCraft. 2024-05-07T05:05:51Z 2024-05-07T05:05:51Z Vivek Gite

How to add bash auto completion in Debian Linux

nixCraft - Fri, 01/16/2026 - 06:35
Bash is a command language interpreter compatible with sh. It can execute commands read from a file or keyboard. On Debian Linux, bash-completion is a set of shell functions that uses Bash's programmable completion feature. This page provides instructions on installing and enabling Bash auto-completion on Debian Linux versions 10, 11, and 12 to increase productivity by writing custom bash code. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to add bash auto completion in Debian Linux appeared first on nixCraft. 2024-05-06T15:51:25Z 2024-05-06T15:51:25Z Vivek Gite

How to add cron job entry for acme.sh

nixCraft - Fri, 01/16/2026 - 06:35
Recently, I had a learning experience with cron jobs and acme.sh. acme.sh is an excellent tool that simplifies the management of Let's Encrypt TLS (SSL) certificates. It makes obtaining and renewing these essential security certificates for your web server easier. Recently, I moved my server from Linode to AWS, which was a new environment for me. Initially, everything appeared to be working correctly, and I assumed everything was running smoothly. However, I forgot to migrate the cron job that acme.sh uses to renew the certificate automatically. This oversight caused my Let's Encrypt certificates to expire, resulting in security warnings and potential disruptions for visitors to my website. Opps! Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to add cron job entry for acme.sh appeared first on nixCraft. 2024-05-03T06:43:12Z 2024-05-03T06:43:12Z Vivek Gite

How to Upgrade Ubuntu 22.04 to 24.04 LTS: A Complete Guide

nixCraft - Fri, 01/16/2026 - 06:35
{nixCraft Patreon supporters content}Below is a sneak peek of this content! Ubuntu 24.04 LTS (Noble Numbat) was launched on April 25th, 2024. This new version will be supported for five years until June 2029. The armhf architecture now provides support for the Year 2038 problem. The upgrades include significant updates to core packages like Linux kernel, systemd, Netplan, […]The post How to Upgrade Ubuntu 22.04 to 24.04 LTS: A Complete Guide appeared first on Opensource Flare✨. 2024-04-26T18:25:08Z 2024-04-26T18:25:08Z Vivek Gite

How to Upgrade Ubuntu 22.04 to 24.04 LTS: A Complete Guide

nixCraft - Fri, 01/16/2026 - 06:35
Ubuntu 24.04 LTS (Noble Numbat) was launched on April 25th, 2024. This new version will be supported for five years until June 2029. The armhf architecture now provides support for the Year 2038 problem. The upgrades include significant updates to core packages like Linux kernel, systemd, Netplan, toolchain upgrades for better development support, enhanced security measures, and performance optimizations. It also has an updated GNOME desktop environment and other default applications. Let us see how to upgrade Ubuntu 22.04 LTS to Ubuntu 24.04 LTS using the CLI over ssh-based session. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to Upgrade Ubuntu 22.04 to 24.04 LTS: A Complete Guide appeared first on nixCraft. 2024-04-26T08:33:21Z 2024-04-26T08:33:21Z Vivek Gite

How to configure AWS SES with Postfix MTA on Debian Linux

nixCraft - Fri, 01/16/2026 - 06:35
AWS SES (Amazon Simple Email Service) is a cloud-based email-sending service that is both reliable and cost-effective. This service is offered by Amazon Web Services. Postfix is a popular email server for Debian and Unix-like systems. It is an open-source Mail Transfer Agent (MTA) responsible for routing and delivering emails. Debian Linux is a widely used Linux distribution known for its stability and user-friendliness for server usage. Let us see how to integrate AWS SES with the Postfix MTA on Debian Linux version 11/12. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How to configure AWS SES with Postfix MTA on Debian Linux appeared first on nixCraft. 2024-04-19T07:04:06Z 2024-04-19T07:04:06Z Vivek Gite

The repository ‘http://deb.debian.org/debian buster-backports Release’ no longer has a Release file.

nixCraft - Fri, 01/16/2026 - 06:35
When you run the sudo apt update, you may see the following message or error on a Debian Linux: Err:5 http://deb.debian.org/debian buster-backports Release 404 Not Found [IP: 146.75.34.132 80] Reading package lists... Done E: The repository 'http://deb.debian.org/debian buster-backports Release' no longer has a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. Here is how to fix this issue. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post The repository ‘http://deb.debian.org/debian buster-backports Release’ no longer has a Release file. appeared first on nixCraft. 2024-04-14T20:42:01Z 2024-04-14T20:42:01Z Vivek Gite

How do I find out my timezone in Linux?

nixCraft - Fri, 01/16/2026 - 06:35
You can find the timezone in Linux using the command line. The easiest way to do this is to type the "timedatectl" command and look for the "timezone" line when using modern Linux distros with systemd. There are other commands and ways to temporarily switch to a new timezone for date calculations. Love this? sudo share_on: Twitter - Facebook - LinkedIn - Whatsapp - Reddit The post How do I find out my timezone in Linux? appeared first on nixCraft. 2024-04-06T01:06:44Z 2024-04-06T01:06:44Z Vivek Gite

'Star Wars' Boss Kathleen Kennedy Steps Down From Lucasfilm

Slashdot.org - Fri, 01/16/2026 - 05:00
After more than 13 years leading Lucasfilm, Kathleen Kennedy is stepping down. "When George Lucas asked me to take over Lucasfilm upon his retirement, I couldn't have imagined what lay ahead," said Kennedy. "It has been a true privilege to spend more than a decade working alongside the extraordinary talent at Lucasfilm." The Associated Press reports: The Walt Disney Co. announced Thursday that it will now turn to Dave Filoni to steer "Star Wars," as president and chief creative officer, into its sixth decade and beyond. Filoni, who served as the chief commercial officer of Lucasfilm, will inherit the mantle of one of the movies marquee franchises, alongside Lynwen Brennan, president and general manager of Lucasfilm's businesses, who will serve as co-president. Kennedy, Lucas' handpicked successor, had presided over the ever-expanding science-fiction world of "Star Wars" since Disney acquired it in 2012. In announcing Thursday's news, Bob Iger, chief executive officer of the Walt Disney Co. called her "a visionary filmmaker." Kennedy oversaw a highly lucrative but often contentious period in "Star Wars" history that yielded a blockbuster trilogy and acclaimed streaming spinoffs such as "The Mandalorian" and "Andor," yet found increasing frustration from longtime fans. Under Kennedy's stewardship, Lucasfilm amassed more than $5.6 billion in box office and helped establish Disney+ as a streaming destination -- achievements that easily validated the $4.05 billion Disney plunked down for the company. But Kennedy also struggled to deliver the big-screen magic that Lucas captured in the original trilogy from the late 1970s and early 1980s, and her relationship with "Star Wars" loyalists became a saga of its own.

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US Carbon Pollution Rose In 2025, a Reversal From Prior Years

Slashdot.org - Fri, 01/16/2026 - 02:00
In a reversal from previous years, U.S. carbon emissions rose 2.4% in 2025 compared with the year before. NBC News reports: The increase in greenhouse gas emissions is attributable to a combination of a cool winter, the explosive growth of data centers and cryptocurrency mining and higher natural gas prices, according to the Rhodium Group, an independent research firm. Environmental policy rollbacks by President Donald Trump's administration were not significant factors in the increase because they were only put in place this year, the study authors said. Heat-trapping gases from the burning of coal, oil and natural gas are the major cause of worsening global warming, scientists say. American emissions of carbon dioxide and methane had dropped 20% from 2005 to 2024, with a few one- or two-year increases in the overall downward trend. Traditionally, carbon pollution has risen alongside economic growth, but efforts to boost cleaner energy in recent years decoupled the two, so emissions would drop as gross domestic product rose. But that changed last year with pollution actually growing faster than economic activity, said study co-author Ben King, a director in Rhodium's energy group. He estimated the U.S. put 5.9 billion tons (5.35 billion metric tons) of carbon dioxide equivalent in the air in 2025, which is 139 million tons (126 million metric tons) more than in 2024. The cold 2025 winter meant more heating of buildings, which often comes from natural gas and fuel oil that are big greenhouse gas emitters, King said. A significant and noticeable jump in electricity demand from data centers and cryptocurrency mining meant more power plants producing energy. That included plants using coal, which creates more carbon pollution than other fuel sources. A rise in natural gas prices helped create an 13% increase in coal power, which had shrunk by nearly two-thirds since its peak in 2007, King said.

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Study Finds Weak Evidence Linking Social Media Use to Teen Mental Health Problems

Slashdot.org - Thu, 01/15/2026 - 22:30
An anonymous reader quotes a report from the Guardian: Screen time spent gaming or on social media does not cause mental health problems in teenagers, according to a large-scale study. [...] Researchers at the University of Manchester followed 25,000 11- to 14-year-olds over three school years, tracking their self-reported social media habits, gaming frequency and emotional difficulties to find out whether technology use genuinely predicted later mental health difficulties. Participants were asked how much time on a normal weekday in term time they spent on TikTok, Instagram, Snapchat and other social media, or gaming. They were also asked questions about their feelings, mood and wider mental health. The study found no evidence for boys or girls that heavier social media use or more frequent gaming increased teenagers' symptoms of anxiety or depression over the following year. Increases in girls' and boys' social media use from year 8 to year 9 and from year 9 to year 10 had zero detrimental impact on their mental health the following year, the authors found. More time spent gaming also had a zero negative effect on pupils' mental health. "We know families are worried, but our results do not support the idea that simply spending time on social media or gaming leads to mental health problems -- the story is far more complex than that," said the lead author Dr Qiqi Cheng. The research, published in the Journal of Public Health, also examined whether how pupils use social media makes a difference, with participants asked how much time spent chatting with others, posting stories, pictures and videos, browsing feeds, profiles or scrolling through photos and stories. The scientists found that actively chatting on social media or passive scrolling feeds did not appear to drive mental health difficulties. The authors stressed that the findings did not mean online experiences were harmless. Hurtful messages, online pressures and extreme content could have detrimental effects on wellbeing, but focusing on screen time alone was not helpful, they said.

Read more of this story at Slashdot.

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