Tag: Linux
4 posts
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Linux Internals & Operations: CFS Scheduling and Page Cache
CFS scheduler, page cache and swap, VFS and dentry/inode, syscall path and observability, cgroups v2 and production SRE patterns.
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Linux and macOS Terminal Commands for Developers: GNU vs BSD Differences and Troubleshooting
A practical Linux and macOS terminal reference for developers, with the why behind each command, GNU vs BSD gotchas, and real troubleshooting workflows.
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Surviving Vim: Exiting, Modes, Navigation, Editing and Search-and-Replace Commands
A practical Vi/Vim guide: how to exit, what the modes are, moving around, editing text, search and replace, and copy, paste and delete commands.
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Hardening SSH on Linux Servers: sshd_config, Key Authentication, Agent Forwarding and Jump Hosts
How SSH key exchange and host verification work, key-only authentication, sshd_config hardening that actually takes effect, agent forwarding risks, port forwarding, known_hosts, and ProxyJump bastions with OpenSSH.