序章
在前面两篇随笔中,提到了添加下面的前缀才可以执行命令:
Windows:cmd /C
Linux:/bin/bash -c
本文介绍这两个命令。ben发布于博客园
Windows之cmd
cmd 即 cmd.exe。
查询其位置:where cmd
D:\>where cmd
C:\Windows\System32\cmd.exe
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查看 cmd 的详情:cmd /? 或者 help cmd
D:\>cmd /?
Starts a new instance of the Windows command interpreter
翻译:启动Windows命令解释器的一个新实例
CMD [/A | /U] [/Q] [/D] [/E:ON | /E:OFF] [/F:ON | /F:OFF] [/V:ON | /V:OFF]
[[/S] [/C | /K] string]
/C Carries out the command specified by string and then terminates
翻译:执行字符串指定的命令并终止。
/K Carries out the command specified by string but remains
/S Modifies the treatment of string after /C or /K (see below)
/Q Turns echo off
/D Disable execution of AutoRun commands from registry (see below)
/A Causes the output of internal commands to a pipe or file to be ANSI
/U Causes the output of internal commands to a pipe or file to be
Unicode
...省略...
Note that multiple commands separated by the command separator '&&'
are accepted for string if surrounded by quotes.
翻译:请注意,由命令分隔符“&&”分隔的多个命令如果被引号包围,则接受字符串。
Also, for compatibility
reasons, /X is the same as /E:ON, /Y is the same as /E:OFF and /R is the
same as /C. Any other switches are ignored.
...省略...
cmd /C 示例
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Linux之bash
前文介绍过,除了 bash,还有sh、dash。
三者的关系及区别见 参考资料#1。ben发布于博客园
命令所在位置:使用 whereis 命令
ben@ben-u:~$ whereis bash
bash: /usr/bin/bash /etc/bash.bashrc /usr/share/man/man1/bash.1.gz
ben@ben-u:~$ whereis sh
sh: /usr/bin/sh /usr/share/man/man1/sh.1.gz
ben@ben-u:~$ whereis dash
dash: /usr/bin/dash /usr/share/man/man1/dash.1.gz
查看 bash 命令详情:1)--help;2)man bash
ben@ben-u:~$ bash --help
GNU bash, version 5.0.17(1)-release-(x86_64-pc-linux-gnu)
Usage: bash [GNU long option] [option] ...
bash [GNU long option] [option] script-file ...
GNU long options:
--debug
--debugger
--dump-po-strings
--dump-strings
--help
--init-file
--login
--noediting
--noprofile
--norc
--posix
--pretty-print
--rcfile
--restricted
--verbose
--version
Shell options:
-ilrsD or -c command or -O shopt_option (invocation only)
-abefhkmnptuvxBCHP or -o option
Type `bash -c "help set"' for more information about shell options.
Type `bash -c help' for more information about shell builtin commands.
Use the `bashbug' command to report bugs.
bash home page: <http://www.gnu.org/software/bash>
General help using GNU software: <http://www.gnu.org/gethelp/>
ben@ben-u:~$
还可以输入 bash -c "help set" 查看选项信息;输入 bash -c help 查看更多信息(真多)。
使用 man 命令:
其中关于 -c 选项的解释:ben发布于博客园
-c
If the -c option is present, then commands are read from the first non-option argument command_string.
翻译:如果存在-c选项,则从第一个非选项参数命令_string中读取命令。
If there are arguments after the command_string, the first argument is assigned to $0
and any remaining arguments are assigned to the positional parameters.
翻译:如果command_strint后面有参数,则将第一个参数分配给$0而任何剩下的参数都被分配给了位置参数。
The assignment to $0 sets the name of the shell, which is used in warning and error messages.
翻译:分配为$0将设置shell的名称,用于发送警告和错误消息。
注,内容很多,孤未全阅。
bash -c 示例
从测试结果来看,在终端执行时,需要使用 && 替代 管道运算符。ben发布于博客园
本文链接:ben发布于博客园
https://www.cnblogs.com/luo630/p/16996774.html
参考资料
1、linux中的sh、dash、bash的区别
https://www.cnblogs.com/macrored/p/11548347.html
posted @ 2019-09-19 12:03 Macrored
2、linux shell 执行多个命令的方法
https://www.cnblogs.com/youxin/p/3181120.html
2013-07-09 23:32 youxin
3、
ben发布于博客园
标签:Java,help,Process,cmd,--,command,ben,bash From: https://www.cnblogs.com/luo630/p/16996774.html