ksh 命令

常用示例

说明

ksh is the Korn shell, combining features of the Bourne shell (sh) and C shell (csh). It provides advanced scripting capabilities with interactive command-line editing, command history, job control, and aliases. The shell supports both vi and emacs editing modes, associative and indexed arrays, arithmetic evaluation, coprocesses, and pattern matching. ksh93 is the most widely used version; ksh2020 is a more recent release.

参数

-c _CMD_

Execute command string.

-l

Login shell (reads profile files).

-r

Restricted shell (limits `cd`, path changes, and redirections). Equivalent to invoking as `rksh`.

-s

Read commands from standard input.

-o _OPTION_

Set shell option (e.g., `vi`, `emacs`, `posix`, `noclobber`, `errexit`, `noglob`, `pipefail`).

+o _OPTION_

Unset the given shell option.

-i

Force interactive shell mode.

-n

Read commands but do not execute them (syntax check).

-x

Print commands and arguments as they are executed (trace mode).

-e

Exit immediately if a command exits with non-zero status.

-v

Print shell input lines as they are read.

-a

Export all assigned variables automatically.

-u

Treat unset variables as an error when substituting.

-R _file_

Write a cross-reference listing to _file_ (ksh93 only).