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tech_docs/linux/linux_sysadmin.md

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+Ah, now we're talking about the essential sysadmin toolkit. Here's what belongs on a minimal but functional admin workstation:
+
+## Network Troubleshooting Core
+```bash
+# The holy trinity
+apt install dnsutils net-tools iproute2
+```
+- **dig/nslookup** - DNS troubleshooting (dnsutils)
+- **ss/netstat** - connection analysis
+- **ip** - modern network config (replaces ifconfig)
+
+## System Analysis Essentials
+```bash
+apt install htop iotop lsof strace tcpdump
+```
+- **htop** - better than top, essential for process monitoring
+- **iotop** - disk I/O analysis when things get slow
+- **lsof** - "what file/port is being used by what process"
+- **strace** - syscall tracing for debugging mysterious failures
+- **tcpdump** - packet capture (Wireshark's command-line cousin)
+
+## File/Text Manipulation That Actually Matters
+```bash
+apt install rsync tree jq curl wget
+```
+- **rsync** - proper file synchronization/backup
+- **tree** - visual directory structure
+- **jq** - JSON parsing (critical in modern infrastructure)
+- **curl/wget** - API testing and file downloads
+
+## Remote Access & Security
+```bash
+apt install openssh-client tmux screen
+```
+- **tmux/screen** - persistent sessions (pick one, learn it well)
+- **ssh-client** - obviously, but add key management tools
+
+## Modern Infrastructure Tools
+```bash
+# These might need manual installation
+- git (version control)
+- docker (containerization)
+- kubectl (if you touch Kubernetes)
+```
+
+## The "Maybe" Category
+- **vim/nano** - pick an editor, master it
+- **bat** - better cat with syntax highlighting
+- **fd** - faster find
+- **ripgrep (rg)** - better grep
+
+## What NOT to Install
+Skip these space-wasters on a minimal system:
+- Desktop environments
+- Games/multimedia
+- Language runtimes you don't use
+- GUI network managers
+- Unnecessary daemons
+
+The key is: if you can't explain why a tool would help you troubleshoot a production issue or manage systems more effectively, don't install it. This list covers network issues, performance problems, file management, and remote work - the core of what sysadmins actually do daily.