Lmst

Learn a simple, portable Linux shell command to display each PATH directory on its own line. Works in bash, sh, zsh, and more.

Full guide here: https://ostechnix.com/read-linux-path-variable-line-by-line/

#PathVariable #Linux #Linuxshelltip #Linuxtips #Linuxbasics #Linuxcommands

Logs, databases, and caches grow under /var. Learn why Linux admins monitor the /var directory to prevent disk issues and service failures.

Full guide here: https://ostechnix.com/why-linux-admins-should-monitor-var/

#Logs #Var #Linuxadmin #Diskusage #Linuxhowto #Linuxcommands

Learn what Pacsave files are in Arch Linux, why pacman creates .pacsave files, and how to restore your old configurations safely after removing a package.

Step-by-Step Tutorial: https://ostechnix.com/understanding-pacsave-files-in-arch-linux/

#Pacsave #Pacman #Archlinux #Packagemanagement #Linuxcommands #Linuxbasics #Linuxhowto

Learn what drop-in (.d) directories are in Linux and how they help manage configuration files safely.

Full guide here: https://ostechnix.com/drop-in-d-directories-linux-configuration-explained/

#Linux #Linuxbasics #Linuxcommands #LinuxConfiguration #Linuxadmin

less 其他很好用的快捷鍵還有：

v 可以開啟編輯器，限用檔名開啟 less 的場合

s 可以把 buffer 內容存成檔案，某種程度上可以代替 more-utils 的 sponge

F 類似 `tail -f` 的功能

然後 `+` 這個命令列參數可以把快捷鍵用命令列參數傳入，像 `less +F` 就類似 `tail -f`

#linux #LinuxCommands

#TIL less 裡有的內建的 `^` `$` 書籤可以和 `|` 搭配使用

linux less 裡 `|` 可以把內容用管道傳給指令，我以前就知道這個。
但是 `|` 會要求輸入書籤過的位置，只會 pipe mark 和現在位置間的內容，
以前我都是要先 `g` 回頭頂部 `m` 標書籤，再 G 到最底部 pipe。

今天發現 less 有二個特殊書籤 `^$` 代表頂部或底部，
可以直接在最頂部輸入 `|$` 把整個 buffer pipe 出去，
或是 `|^` 在底部。

#Linux #LinuxCommands

https://technologiesinternetz.blogspot.com/2025/10/linux-operating-system-foundation-of.html?m=1

Linux Operating System: The Foundation of Modern Computing

#linuxcommands #linux #operatingsystem #moderncomputing

https://technologiesinternetz.blogspot.com/2025/10/linux-operating-system-foundation-of.html?m=1

Linux Operating System: The Foundation of Modern Computing

#linuxcommands #linux #operatingsystem #moderncomputing

Learn how to use Linux help commands like apropos, whatis, man, info, and --help to discover commands and learn their usage.

Full tutorial with examples: https://ostechnix.com/linux-command-help-guide/

#Linux #Linuxcommands #Linuxbasics #Linuxhelp

🐧 Top 50 Linux Commands – Quick Guide for Security & SysAdmin Pros ⚡

Linux is the backbone of cybersecurity 🔐, servers 🌐, and DevOps 🚀. Mastering commands makes you faster, sharper, and more effective in troubleshooting 🛠️, monitoring 📊, and defending systems 🛡️.

From navigation & file ops 📂 (ls, cd, pwd, cp, mv) to permissions & ownership 🔑 (chmod, chown, umask), Linux gives you total control. For process & system monitoring ⚙️ (ps, top, htop, kill, uptime), you can quickly spot what’s happening inside your machine.

Networking 🌍 is at the heart of cybersecurity: commands like ifconfig/ip a 📡, ping 🛰️, traceroute 🛣️, netstat/ss 🔎, and curl/wget 🌐 help you diagnose and analyze connections. For security researchers 🕵️‍♂️, tools like tcpdump 📥, nmap 🧿, and wireshark 🐠 provide deep packet insights.

You’ll also need package & service management 📦 (apt-get, yum, systemctl, journalctl), archiving & compression 🗄️ (tar, gzip, zip/unzip), and text processing ✍️ (grep, awk, sed, sort). Combine them with scripting 🤖 (bash, cron, alias) to automate and scale your work.

⚠️ Disclaimer:
For educational purposes only. Use these commands responsibly in labs or on systems you manage. 🚫🔒

#Linux #CyberSecurity #InfoSec #SysAdmin #BlueTeam #RedTeam #CommandLine #LinuxCommands #SecurityAwareness 🐧⚡