-e：告诉perl在其后的命令行里查找运行代码。当然只能用于输入一行代码执行，如果要运行的代码不止一行，参数就变了。
xiafoei@linux:~/work> perl -e 'print "hello!\n";'
hello!
xiafoei@linux:~/work>
-：告诉perl在其后的命令行里查找运行代码，直到遇到__END__为止。
xiafoei@linux:~/work> perl -
print "hello\n";
print "world!";
__END__
hello
world!xiafoei@linux:~/work>
-c：用来检查脚本的语法而不执行它。
xiafoei@linux:~/work> cat t
#!/usr/bin/perl
print "hello";
xiafoei@linux:~/work> perl -c t
t syntax OK
xiafoei@linux:~/work>
-h：帮助选项，用来打印perl的全部选项信息。
xiafoei@linux:~/work> perl -h
Usage: perl [switches] [--] [programfile] [arguments]
-0[octal] specify record separator (\0, if no argument)
-a autosplit mode with -n or -p (splits $_ into @F)
-C[number/list] enables the listed Unicode features
-c check syntax only (runs BEGIN and CHECK blocks)
-d[:debugger] run program under debugger
-D[number/list] set debugging flags (argument is a bit mask or alphabets)
-e program one line of program (several -e's allowed, omit programfile)
-F/pattern/ split() pattern for -a switch (//'s are optional)
-i[extension] edit <> files in place (makes backup if extension supplied)
-Idirectory specify @INC/#include directory (several -I's allowed)
-l[octal] enable line ending processing, specifies line terminator
-[mM][-]module execute `use/no module...' before executing program
-n assume 'while (<>) { ... }' loop around program
-p assume loop like -n but print line also, like sed
-P run program through C preprocessor before compilation
-s enable rudimentary parsing for switches after programfile
-S look for programfile using PATH environment variable
-t enable tainting warnings
-T enable tainting checks
-u dump core after parsing program
-U allow unsafe operations
-v print version, subversion (includes VERY IMPORTANT perl info)
-V[:variable] print configuration summary (or a single Config.pm variable)
-w enable many useful warnings (RECOMMENDED)
-W enable all warnings
-x[directory] strip off text before #!perl line and perhaps cd to directory
-X disable all warnings
xiafoei@linux:~/work>
-S：让perl使用PATH环境变量来搜索脚本。
xiafoei@linux:~/work> echo $PATH
/home/xk/bin:/usr/local/bin:/usr/bin:/usr/X11R6/bin:/bin:/usr/games:/opt/gnome/bin:/opt/kde3/bin
xiafoei@linux:~/work> cd ../bin/
xiafoei@linux:~/bin> ls
xiafoei@linux:~/bin> cat >test.pl<
> #!/usr/bin/perl
> print "hello\n";
> eof
xiafoei@linux:~/bin> chmod a+x test.pl
xiafoei@linux:~/bin> cd ../work
xiafoei@linux:~/work> perl -S test.pl
hello
xiafoei@linux:~/work>
-T：强制打开错误检查（数据安全性检查），经常用在CGI中。
-v：打印出perl的版本以及包的级别。
xiafoei@linux:~/work> perl -v
This is perl, v5.8.6 built for i586-linux-thread-multi
Copyright 1987-2004, Larry Wall
Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.
Complete documentation for Perl, including FAQ lists, should be found on
this system using `man perl' or `perldoc perl'. If you have access to the
Internet, point your browser at the Perl Home Page.
xiafoei@linux:~/work>
-V：打印出perl的全部配置信息。
xiafoei@linux:~/work> perl -V
Summary of my perl5 (revision 5 version 8 subversion 6) configuration:
Platform:
osname=linux, osvers=2.6.9, archname=i586-linux-thread-multi
uname='linux salieri 2.6.9 #1 smp fri jan 14 15:41:33 utc 2005 i686 athlon i386 gnulinux '
config_args='-ds -e -Dprefix=/usr -Dvendorprefix=/usr -Dinstallusrbinperl -Dusethreads -Di_db -Di_dbm -Di_ndbm -Di_gdbm -Duseshrplib=true -Doptimize=-O2 -march=i586 -mcpu=i686 -fmessage-length=0 -Wall -g -Wall -pipe'
hint=recommended, useposix=true, d_sigaction=define
usethreads=define use5005threads=undef useithreads=define usemultiplicity=define
useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
use64bitint=undef use64bitall=undef uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBUGGING -fno-strict-aliasing -pipe -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
optimize='-O2 -march=i586 -mcpu=i686 -fmessage-length=0 -Wall -g -Wall -pipe',
cppflags='-D_REENTRANT -D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBUGGING -fno-strict-aliasing -pipe'
ccversion='', gccversion='3.3.5 20050117 (prerelease) (SUSE Linux)', gccosandvers=''
intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=4, prototype=define
Linker and Libraries:
ld='cc', ldflags =''
libpth=/lib /usr/lib /usr/local/lib
libs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
perllibs=-lnsl -ldl -lm -lcrypt -lutil -lpthread -lc
libc=, so=so, useshrplib=true, libperl=libperl.so
gnulibc_version='2.3.4'
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E -Wl,-rpath,/usr/lib/perl5/5.8.6/i586-linux-thread-multi/CORE'
cccdlflags='-fPIC', lddlflags='-shared'
Characteristics of this binary (from libperl):
Compile-time options: DEBUGGING MULTIPLICITY USE_ITHREADS USE_LARGE_FILES PERL_IMPLICIT_CONTEXT
Built under linux
Compiled at Mar 19 2005 17:34:48
@INC:
/usr/lib/perl5/5.8.6/i586-linux-thread-multi
/usr/lib/perl5/5.8.6
/usr/lib/perl5/site_perl/5.8.6/i586-linux-thread-multi
/usr/lib/perl5/site_perl/5.8.6
/usr/lib/perl5/site_perl
/usr/lib/perl5/vendor_perl/5.8.6/i586-linux-thread-multi
/usr/lib/perl5/vendor_perl/5.8.6
/usr/lib/perl5/vendor_perl
.
xiafoei@linux:~/work>
-V:name：打印出指定name的配置变量的配置信息。
xiafoei@linux:~/work> perl -V:osvers
osvers='2.6.9';
xiafoei@linux:~/work>
-w：显示警告信息。
[xiaofei@xiaofei]$ cat test.pl
#!/bin/perl
$text = "test";
$text += 1;
print $text;
[xiaofei@xiaofei]$ perl -w test.pl
Argument "test" isn't numeric in addition (+) at test.pl line 3.
1[xiaofei@xiaofei]$ perl test.pl
1[xiaofei@xiaofei]$
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