Essential Bash/Linux terminal patterns for command chaining, file operations, process management, and scripting.

• Covers operator syntax (;, &&, ||, |), file operations (ls, find, grep, tail), and process management (ps, kill, lsof)
• Includes text processing tools (grep, sed, awk, cut, sort) and network commands (curl, nc, ifconfig)
• Provides script templates with error handling (set -e, set -u, set -o pipefail) and cleanup patterns using trap
• Includes common patterns like command existence checks, default variable values, file iteration, and line-by-line file reading