[問題] linux help 如何解讀

看板Linux作者gecer (gecer)時間7年前 (2018/03/31 18:27)推噓2(2推 0噓 5→)

留言7則, 4人參與討論串1/1

如下範例小弟當閱讀指令說明時如何理解對應順序?例如下面指令 switches 對應的是那些範圍? Usage: /home/linux/myperl/bin/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) -E program like -e, but enables all optional features -f don't do $sitelib/sitecustomize.pl at startup -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 -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, patchlevel and license -V[:variable] print configuration summary (or a single Config.pm variable) -w enable many useful warnings -W enable all warnings -x[directory] ignore text before #!perl line (optionally cd to directory) -X disable all warnings -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 111.255.12.55 ※ 文章網址: https://www.ptt.cc/bbs/Linux/M.1522492034.A.DC2.html