sh(1) sh: Bourne shell (command interpreter).
sh(1) for: loop through list of names.
sh(1) case: match word against patterns.
sh(1) if: conditional command execution.
sh(1) while: repeat commands conditionally.
sh(1) break: exit for/while loop.
sh(1) continue: begin next loop iteration.
sh(1) cd: change directory.
sh(1) eval: read argumenents as input.
sh(1) exec: overlay shell with specified command.
sh(1) exit: terminate non-interactive shell.
sh(1) export: place variable in environment.
sh(1) read: set variables from input.
sh(1) readonly: mark shell variables as read-only.
sh(1) set: set shell options.
sh(1) shift: step through arguments.
sh(1) times: print user and system times.
sh(1) trap: set signal action.
sh(1) umask: change or display file creation mask.
sh(1) wait: wait for background processes to complete.