1 shuf --help 2 用法： shuf [選項]... [文件] 3 或者: shuf -e [選項]... [參數]... 4 或者: shuf -i LO-HI [選項]... 5 Write a random permutation of the input lines to standard output. 6 7 如果沒有指定文件，或者文件為"-"，則從標准輸入讀取。 8 9 必選參數對長短選項同時適用。 10 -e, --echo treat each ARG as an input line 11 -i, --input-range=LO-HI treat each number LO through HI as an input line 12 -n, --head-count=COUNT output at most COUNT lines 13 -o, --output=FILE write result to FILE instead of standard output 14 --random-source=FILE get random bytes from FILE 15 -r, --repeat output lines can be repeated 16 -z, --zero-terminated line delimiter is NUL, not newline 17 --help 顯示此幫助信息並退出 18 --version 顯示版本信息並退出 19 20 GNU coreutils online help: <http://www.gnu.org/software/coreutils/> 21 請向<http://translationproject.org/team/zh_CN.html> 報告shuf 的翻譯錯誤 22 Full documentation at: <http://www.gnu.org/software/coreutils/shuf> 23 or available locally via: info '(coreutils) shuf invocation'
ps:
shuf train.txt -o test.txt -n 30
從train.txt文件中隨機讀取30行文本輸出到test.txt