Shell中直接调用perl命令

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The -e option is handy for quick Perl operations from the command line. Want to change all instances of "oldstring" in Wiffle.bat to "newstrong"? Try

perl -i.old -p -e "s/ oldstring/ newstrong/g" wiffle.bat

This says: "Take each line of Wiffle.bat (-p); store the original in Wiffle.old (-i); substitute all instances of oldstring with newstrong (-e); write the result (-p) to the original file (-i)."

Other PERL command line options are:

Perl 5 Command-Line Switches

Option	Arguments	Purpose	Notes
`-0`	octal character code	Specify record separator	Default is newline (`/n`)
`-a`	none	Automatically spli recordst	Used with `-n` or or `-p`
`-c`	none	Check syntax only	Do not execute
`-d`	none	Run script using Perl debugger	If Perl debugging option was included when Perl was installed
`-D`	flags	Specify debugging behavior	See table 2
`-e`	command	Pass a command to Perl from the command line	Useful for quick operations
`-F`	regular expression	If `-a` used	Expression to split by default is white space
`-i`	extension	Replace original file with results	Useful for modifying contents of files
`-I`	directory	Specify location of `include` files
`-l`	octal character code	Drop newlines when used	With `-n` and `-p` and use designated character as line- termination character
`-n`	none	Process the script using each specified file as an argument	Used for performing the same set of actions on a set of files
`-p`	none	Same as `-n` but each line is printed
`-P`	none	Run the script through the C preprocessor before Perl compiles it
`-s`	none	Enable passing of arbitrary switches to Perl	Use `-s -what -ever` to have the Perl variables `$what`and `$ever` defined within your script
`-S`	none	Tell Perl to look along the path for the script
`-T`	none	Use taint checking; don't evaluate expressions supplied on the command line
`-u`	none	Make Perl dump core after compiling your script; intended to allow for generation of Perl executables	Very messy; wait for the Perl compiler
`-U`	none	Unsafe mode; overrides Perl's natural caution	Don't use this!
`-v`	none	Print Perl version number
`-w`	none	Print warnings about script syntax	Extremely useful, especially during development