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Linux Beginner

What is SSH (Secure Shell)?

A cryptographic network protocol for secure remote login and command execution over an unsecured network.

SSH provides encrypted communication between two computers. It replaces insecure protocols like Telnet and rlogin. SSH uses public-key cryptography for authentication and symmetric encryption for data transfer.

Common uses include remote server management, file transfer (via SCP/SFTP), port forwarding, and tunneling. The default port is 22.

Related Terms

LVM (Logical Volume Manager)
A storage management framework that provides flexible disk management through abstract layers of physical and logical volumes.
Journalctl
A command-line tool for querying and viewing logs collected by systemd's journal logging system.
ACL (Access Control List)
An extension to standard Linux file permissions that allows setting fine-grained access rights for specific users and groups beyond owner/group/other.
Chown
A command to change the owner and group of files and directories in Linux.
Disk Quota
A system for limiting the amount of disk space or number of files that individual users or groups can consume on a filesystem.
Tmux
A terminal multiplexer that allows running multiple terminal sessions within a single window, with detach/reattach capability.
 View All Linux Terms →