tag

#file-descriptors

3 posts

Shell & TerminalDeep Dive August 27, 2026 6 min read

Shell exec: Replacing a Process Without Spawning Another Wrapper

How the shell exec builtin replaces its process, preserves PID and selected descriptors, changes signal and trap behavior, and simplifies service wrappers.

#shell#exec#processes

Shell & TerminalDeep Dive August 9, 2026 3 min read

Shell File Descriptors and Redirection: Ordering, Duplication, and Lifetime

A precise model of shell file descriptors, left-to-right redirection, duplication versus paths, grouping, pipelines, persistent descriptors, and safe logging.

#shell#file-descriptors#redirection

LinuxFix July 9, 2026 4 min read

Fixing 'Too Many Open Files' Errors on Linux

An application errors with EMFILE or ENFILE even though the system isn't obviously out of resources - find and raise the actual limit.

#fix#ulimit#file-descriptors