Linux sysadmin from India . Daily tips on Linux, Bash, SSH, AWS, DevOps & Tech News from 20+ yrs in the terminal. One practical command every day.
India
Joined December 2014
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I've been running Linux systems for 20+ years, servers, VMs, bare metal, all of it.
I post one practical tip every day: SSH tricks, Bash scripts, AWS shortcuts, DevOps tools, Tech News.
Real commands from a real terminal. If you live in the Linux world, follow along.
Quick Linux Tip 60 - How to Backup MySQL Database in Linux Without Downt... youtu.be/SW5qeQQbU6c?si=ewTo…
Quick Linux Tip #115
Q: A buggy script is eating all my RAM. How do I cap its memory usage?
Try:`ulimit -v 524288`
Info: Restricts virtual memory for the current shell session and its child processes.
Follow @linuxteck - 1 practical Linux tip every day.
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day. For more #LinuxTips click here linuxteck.com/linux-tips/
Linux Fundamentals for Beginners: What is Linux & RHEL? youtu.be/Rfl6ADQA9SY?si=xbVR…
Networking Protocols Explained: The 5-Stop Packet Journey (DNS to NTP) youtu.be/Kl5VAK7D6OY?si=oN6d…
You type a URL and the page loads in half a second. Behind that are DOZENS of networking protocols, running in order. 🌐🐧 Here's the whole journey in 5 stops 👇
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Quick Linux Tip 59 - How to Check When a File Was Last Accessed in Linux... youtu.be/82IGa0EqFqs?si=nWxc…
Quick Linux Tip #114
Q: How do I check SSL certificate expiry dates on all my servers in bulk?
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day. For more #LinuxTips click here linuxteck.com/linux-tips/
Linux Laptop Slow? Check CPU Throttling with watch + sensors
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Quick Linux Tip 58 - Is your bash script leaking memory? Check in ONE line youtu.be/PKnaAv5vssE?si=cInw…
Quick Linux Tip #113
Q: My script is slow but I don't know if it's CPU, I/O, or waiting. How do I find out?
Try:`/usr/bin/time -v ./slow_script.sh 2>&1 | grep -E 'Elapsed|CPU|Maximum|context|wait'`
Info: Profiles resource bottlenecks, CPU, and timing.
Follow @linuxteck
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day. For more #LinuxTips click here linuxteck.com/linux-tips/
How to fix a full Linux disk when du doesn't add up (lsof +L1) youtu.be/RMkJMp9g2Zk?si=GZYs…
Quick Linux Tip 57 - SSH through 2 jump hosts in ONE command youtu.be/vTBJZF03N2s?si=UUXH…
Quick Linux Tip #112
Question: I need to run an untrusted binary without exposing my whole system. How?
Try:`sudo mkdir -p /jail/{bin,lib,lib64}`
Info: Restricts a process to a custom root directory.
Want to master Linux one command at a time?
Follow @linuxteck
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day. For more #LinuxTips click here linuxteck.com/linux-tips/
What’s the FIRST thing you lock down on a new server? 👇
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Quick Linux Tip 56 - What's killing your SSD? Find it in ONE command youtu.be/EL0dMe-GSsA?si=_TM5…
Quick Linux Tip #111
Q: I have duplicate-looking files. Are they hardlinks or real copies?
Try:`find /home/linuxteck -type f -links +1 -printf '%i %n %p\n' | sort`
Info: Finds files sharing inodes and link counts to identify hardlinks.
oundaries.
Follow @linuxteck #LinuxTips
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day[cite: 8]. For more #LinuxTips click here linuxteck.com/linux-tips/