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
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Quick Linux Tip 47 - I deleted a file 5 minutes ago and there's no backu... piped.video/kuI2bOHlDII?si=bkdH…
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Quick Linux Tip #103
Q: Something is pegging my CPU. How do I pinpoint it with real-time refresh?
Try:`top -b -n 1 -o %CPU | head -20`
Info: Single snapshot sorted by CPU for quick checks.
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical tip.
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Running AI tools on a VPS: how much server do you actually need? piped.video/7h546MKq36k?si=rRNi…
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Quick Linux Tip #102
Q: DNS is failing intermittently. How do I trace the resolution path?
Try:`dig +trace +noanswer google.com`
Info: Traces full DNS path to locate resolution delays.
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical
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Quick Linux Tip 46 - I'm about to make risky changes. How do I create a ...
piped.video/tUNbvzNeqy8?si=aeEi…
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Quick Linux Tip 45 - My Windows files have wrong encoding on Linux. How ... piped.video/K1Z5tQbo0nk?si=OOjt…
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Quick Linux Tip #101
Q: A single TCP connection seems slow. Can I measure its real throughput?
Try: `sudo iftop -i eth0 -nNP -f 'port 443'`
Info: top for bandwidth; tracks socket throughput
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux
18
Linux Tip 44 - Ping says fine… but your connections still stall? Check ...
piped.video/v_U97UqZ4xg?si=cUIn…
Ever chased a "random" slowdown? 👇
📌 Save this for your next slow-network day.
Follow @linuxteck for one Linux fix every day. linuxteck.com/linux-tips/
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Quick Linux Tip 43 - How do I extract config values from between BEGIN a... piped.video/gGa8TGfp1PE?si=qYYJ… via @YouTube
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Linux Tip #100
Q: I keep typing shutdown on the wrong server. How do I protect against this?
Info: `molly-guard` intercepts shutdown, reboot, and halt commands over active SSH connections and demands explicit hostname confirmation to prevent catastrophic human errors.
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UEFI vs Legacy BIOS: Which Boot Mode Should You Use?
Read more: linuxteck.com/uefi-vs-legacy…
Understand the differences in boot methods, disk partitioning, compatibility, and security before installing Linux or troubleshooting boot issues.
#Linux #UEFI #BIOS #LinuxTips #LinuxTeck
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Quick Linux Tip 42 - How do I watch a long command run AND save its comp... piped.video/dc8AL5oii20?si=0k6M… via @YouTube
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Quick Linux Tip #99
Q: How do I create a true incremental backup without using rsync?
Try:`tar --listed-incremental=/backup/snapshot.snar -czf /backup/incr_$(date +%Y%m%d).tar.gz /home/linuxteck`
Info: Tracks file state via .snar for incrementals.
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Quick Linux Tip 41 - How do I find duplicate files even if they have dif... piped.video/Y_XYLoGqqQw?si=IYHd… via @YouTube
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Quick Linux Tip #98
Q: Something keeps starting a process on my server. How do I catch it?
Try:`sudo execsnoop-bpfcc`
Info: eBPF traces exec() to catch ephemeral processes.
Want to master Linux one command at a time?
Follow @linuxteck
1
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Quick Linux Tip 40 - Which files changed during the incident window last... piped.video/ljZDypnlrnk?si=cARr… via @YouTube
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Quick Linux Tip #97
Q: My binary exists but Linux says 'command not found'. What's wrong?
Try:`file /usr/local/bin/mytool && ldd /usr/local/bin/mytool`
Info: ldd reveals missing shared library dependencies.
Want to master Linux one command at a time?
Follow @linuxteck
1
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Quick Linux Tip 39 - How do I access a private database from my laptop t... piped.video/A9BEBRWbuo0?si=koz4… via @YouTube
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Quick Linux Tip #96
Q: Who accessed "etc-shadow" and when, over the last week?
Try:`sudo aureport --file --start week-ago | grep shadow`
Info: Summarizes file audit reports and tracks login auid.
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Tip
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Linux Tip #95
Question: Two servers behave differently. Which packages differ between them?
Try:`diff <(ssh linuxteck@server1 'dpkg -l | awk "/^ii/{print \$2}"' | sort) <(ssh linuxteck@server2 'dpkg -l | awk "/^ii/{print \$2}"' | sort)`
Follow @linuxteck - 1 practical Tip
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Quick Linux Tip 37 - My backup is killing disk performance. How do I slo... piped.video/5KNJDHIVC7s?si=U154… via @YouTube
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curl vs wget: Which Is Better?
linuxteck.com/curl-vs-wget/
Wget: downloads, retries, resuming & mirroring
cURL: APIs, HTTP requests, custom headers & scripting
Learn the key differences and practical Linux commands.
#Linux #Curl #Wget #LinuxTips #LinuxTeck
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Quick Linux Tip 36 - My connection to a server is slow. Where in the net... piped.video/m3Xh952GqY4?si=nhu-… via @YouTube
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Quick Linux Tip #94
Q: My server is low on RAM but has no swap partition. How do I add swap?
Try
`sudo fallocate -l 4G /swapfile`
`sudo chmod 600 /swapfile`
`sudo mkswap /swapfile`
`sudo swapon /swapfile`
Info: Instantly creates, secures, and activates swap files.
@linuxteck
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Quick Linux Tip #93
Q: A command is slow. Which syscalls are eating all its time?
Try:`strace -c -w ls -laR /home 2>&1 >/dev/null | tail -20`
Info: Profiles syscall wall-clock time to catch I/O bottlenecks.
Want to master Linux one command at a time?
Follow @linuxteck
1
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Quick Linux Tip 35 - My SSH key uses old RSA. How do I switch to a moder... piped.video/32K-cWEdisI?si=zu2-… via @YouTube
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Web agency or freelancer with lots of client sites? 🧑💻 Stop paying for 15 separate hosting plans
Reseller hosting = 1 account → a separate cPanel for every client
Verpex reseller - linuxteck.com/go/verpex
#webagency #freelancewebdeveloper #resellerhosting #webhosting #verpex
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IPv4 vs IPv6: What’s the Difference?
linuxteck.com/ipv4-vs-ipv6/
IPv4 vs IPv6 explained with practical Linux examples.
Compare address size, format, NAT, headers, ARP vs NDP, fragmentation, routing, and useful Linux commands.
#LinuxTeck #Linux #IPv4 #IPv6 #Networking
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Quick Linux Tip 34 -How fast is my network really? Not just ping - actua... piped.video/FA3Ju0yFkSY?si=o1ys… via @YouTube
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Quick Linux Tip #92
Q: A process is misbehaving. Can I dump its memory for post-mortem analysis?
Try:`sudo gcore -o /tmp/mysqld_dump 3456`
Info: gcore dumps process memory live without terminating it.
Want to master Linux one command at a time?
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1
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Top 10 Browsers for Linux in 2026 🌐
linuxteck.com/top-10-browser…
Which Linux browser fits your needs?
Firefox, Brave, LibreWolf, Zen, Chromium, Chrome, Vivaldi, Mullvad, Helium & Falkon - compared for privacy, compatibility, customization and lightweight performance.
#LinuxTeck
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Quick Linux Tip #91
Q: I see unexpected open ports. What program is behind each one?
Try: `sudo ss -tulnp`
Info: Displays open TCP/UDP ports and assigned processes
Want to master Linux one command at a time?
Follow @linuxteck 1 practical Linux tip every day For #LinuxTips
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Quick Linux Tip #90
Question: How do I measure DNS lookup, connect, and download time separately?
Info: curl -w uses variables to break down network latency.
Want to master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day. For more #LinuxTips
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How to Choose VPS Hosting
linuxteck.com/how-to-choose-…
CPU, RAM & storage aren't enough when choosing a VPS.
Check network throughput, PPS limits, throttling policies, location, backups, scalability and management
Choose the VPS around your workload, not the headline specs.
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Which Linux Desktop Environment Is Best for You?
linuxteck.com/best-linux-des…
GNOME vs KDE Plasma vs Xfce vs Cinnamon vs MATE vs LXQt vs Budgie vs COSMIC.
Which is best for your hardware and workflow?
#LinuxTeck #Linux #LinuxDesktop #OpenSource
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Quick Linux Tip #89
Q: The kernel is using tons of RAM. Which modules are the biggest?
Try: `sudo lsmod | sort -k2 -rn | head -10`
Info: lsmod lists module sizes in bytes; sort to identify RAM hogs.
Want to master Linux one command at a time?
Follow @linuxteck
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Quick Linux Tip #88
Q: My server clocks drift. How do I get millisecond-accurate time sync?
Try: `chronyc tracking`
Info: chrony replaces ntpd; tracking monitors clock drift & offset.
To master Linux one command at a time?
Follow @linuxteck - 1 practical Linux tip every day.
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Why Does Linux Have So Many Package Managers?
linuxteck.com/why-so-many-li…
APT. DNF. YUM. Pacman. Zypper. apk.
Why so many package managers?
Here's a practical breakdown
#linuxteck #Linux #LinuxTips #LinuxCommands
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Quick Linux Tip #87
Q: My server is swapping. Which processes are the culprits?
Try: `for pid in $(ls /proc/ | grep -E '^[0-9]+$'); do awk -v pid=$pid '/VmSwap/ {print pid, $2, $3}' /proc/$pid/status 2>/dev/null; done | sort -k2 -rn | head -10`
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Quick Linux Tip #86
Q: Some files won't delete due to attributes. How do I find them?
Try: `sudo lsattr -R /var/log 2>/dev/null | grep -E '^-*[aiu]' | head -10`
Info: lsattr views file flags: i (immutable), a (append), and u (undeletable).
Follow @linuxteck for #LinuxTips
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Quick Linux Tip #85
Q: How do I count new occurrences of an error over time?
Try: `watch -n 5 'grep -c "ERROR" /var/log/nginx/error.log'`
Info: watch tracks metric changes; tail -f | awk counts live log hits.
Follow @linuxteck for more #LinuxTips
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Think You Know Linux Networking? Test Yourself.
linuxteck.com/linux-networki…
Can you troubleshoot a Linux network without guessing?
#linuxteck #LinuxNetworking #LinuxInterview
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Quick Linux Tip #84
Q: Which system calls is a slow process making the most?
Try: `sudo perf trace -p 3456 --summary`
Info: perf trace --summary aggregates syscall latency with lower overhead than strace.
Follow @linuxteck for more #LinuxTips
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Quick Linux Tip #83
Q: How do I create a compressed AND encrypted backup in one command?
Try: `tar -czf - /home/linuxteck/documents | openssl enc -aes-256-cbc -pbkdf2 -out backup.tar.gz.enc`
Info: tar -czf - streams archive to stdout for openssl to encrypt in-memory.
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Quick Linux Tip #82
Q: After copying files, timestamps changed. How do I preserve them?
Try: `rsync -a --preserve-times /source/ /destination/`
Info: rsync -a copies exact file timestamps (mtime) and permissions.
Follow @linuxteck for more #LinuxTips
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Quick Linux Tip #81
Q: My server hits 'too many open files' errors. Which process is the culprit?
Try: `sudo lsof | awk '{print $2}' | sort | uniq -c | sort -rn | head -10`
Info: lsof lists open files; grouping by PID counts open handles per process.
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Quick Linux Tip #80
Q: My server ran out of disk. Which files grew the most in the last 24 hours?
Try: `sudo find / -type f -mtime -1 -size +100M -exec ls -lah {} \; 2>/dev/null`
Info: -mtime -1 filters last 24h, -size +100M finds files >100MB; ignores errors.
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Quick Linux Tip #79
Q: How do I set 644 for files and 755 for directories in one shot?
Try: `find /var/www/site -type d -exec chmod 755 {} + && find /var/log/site -type f -exec chmod 644 {} +`
Info: Targets dirs (755) and files (644) separately using find.
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Deprecated Linux Commands: What to Use Instead
linuxteck.com/deprecated-lin…
Still using some old Linux commands?
Learn commonly used commands are deprecated and what modern alternatives to use instead for networking, DNS, routing, remote access, & more
#linuxteck #Linux #LinuxTips
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Best Linux VPS Hosting 2026: How to Choose the Right Provider
Full guide: linuxteck.com/best-linux-vps…
Need a Linux VPS? Compare providers by workload, price, performance, management, scalability, US locations, and support.
#linuxteck #Linux #VPS #LinuxVPS
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Quick Linux Tip #78
Q: Which network interface is being overloaded?
Try: `sar -n DEV 1 5`
Info: sar -n DEV monitors real-time network traffic per interface.
Follow @linuxteck for more #LinuxTips click here linuxteck.com/linux-tips/
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Quick Linux Tip #77
Q: How do I see all differences between production and my feature branch?
Try: `git log --oneline --left-right --graph main...feature/new-api`
Info: ... shows symmetric difference; --left-right tags side (</>).
Follow @LinuxTeck for more #LinuxTips
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Quick Linux Tip #76
Q: I need SSL for local development. How do I generate a certificate quickly?
Try: `openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 365 -nodes -subj '/CN=localhost'`
Info: Creates a 1-year self-signed SSL cert without prompts
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Quick Linux Tip #75
Q: My high-priority process needs dedicated cores. How do I pin it to specific CPUs?
Try: `taskset -cp 0,1 3456`
Info: taskset binds processes to cores via -c and -p (PID).
Follow @linuxteck for more #LinuxTips
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