Исходное сообщение
"Релиз командного интерпретатора Bash 5.1" Отправлено Аноним, 09-Дек-20 15:00
> В dash/bash круглые скобки форкают sub-shell. Я так понимаю, скрипт tcsh этого > не делает, так что тест некорректен. https://linux.die.net/man/1/tcsh Builtin and non-builtin command execution Builtin commands are executed within the shell. If any component of a pipeline except the last is a builtin command, the pipeline is executed in a subshell. Parenthesized commands are always executed in a subshell.     (cd; pwd); pwd thus prints the home directory, leaving you where you were (printing this after the home directory), while     cd; pwd leaves you in the home directory. Parenthesized commands are most often used to prevent cd from affecting the current shell.