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Configure SSH multiplexing with ControlMaster, ControlPath, and ControlPersist to reuse connections for SSH sessions and file transfers.

Quick reference for Bash job control: background jobs, jobs, fg, bg, wait, and keeping processes alive after logout with disown, nohup, and setsid ...

Replace a local Git branch with its remote version safely using fetch and reset, with backup steps for commits, modified files, and untracked files.

Switch Git branches, create new branches, track remote branches, and handle uncommitted changes with practical git switch examples.

Compare Midnight Commander, Yazi, ranger, lf, and nnn, with installation commands, screenshots, and practical advice for choosing a Linux terminal file manager.

Quick reference for modifying Linux user accounts with usermod and managing groups with groupadd, gpasswd, and groupdel ...

Connect to private servers through an SSH jump host with ssh -J and ProxyJump. Configure keys, copy files, forward ports, and restrict the bastion account.

Apache HTTP Server at a glance: service commands, file layout on Ubuntu and RHEL, virtual hosts, modules, .htaccess, redirects, TLS, reverse proxy, and log formats.

Match strings in Bash with globs, extglob, and the =~ regex operator. Use anchors, quoting, and BASH_REMATCH to test input and capture groups.

SSH client config directives at a glance: Host and Match patterns, keys, jump hosts, keepalives, multiplexing, port forwarding, host key checking, and tokens for ~/.ssh/config.