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grep 尋求特定字串

grep 尋求特定字串. 由標準輸入依照樣本字元逐行搜尋 只要包含所要的樣本字元都會印在標準輸出上 grep [-cilnv] pattern [filelist] 找出以 l 開始的行列 ls -l /bin | grep ^l 找出 process 中含有 melanie 的 process ps aux | grep melanie. 尋找包含樣本字元 strcpy 的 C 程式 grep 'strcpy' *.c 包含樣本字元的行號 grep –n ‘strcpy’ *.c 列出包含樣本字元的檔案名稱 grep –l ‘strcpy’ *.c

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grep 尋求特定字串

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  1. grep尋求特定字串 • 由標準輸入依照樣本字元逐行搜尋 • 只要包含所要的樣本字元都會印在標準輸出上 grep [-cilnv] pattern [filelist] • 找出以l開始的行列 ls -l /bin | grep \^l • 找出process中含有melanie的process ps aux | grep melanie

  2. 尋找包含樣本字元strcpy的C程式 • grep 'strcpy' *.c • 包含樣本字元的行號 • grep –n ‘strcpy’ *.c • 列出包含樣本字元的檔案名稱 • grep –l ‘strcpy’ *.c • 列出不包含樣本字元的所有列 • grep –v ‘strcpy’ out3.c

  3. sort • 輸出到標準輸出 • 以ASCII排序 • 控制字元 • 空白 • 數字 • 大寫字母 • 小寫字母 • 欄位是用空白來界定 • 欄位0為第一欄

  4. sort • -b 略過不對開頭的空白排序 • -f 大小寫字母一視同仁 • -n 依數字排序 • -M依月份順序；Jan < Feb < Mar • -d 依字典順序；忽略標點符號 • -r 反向排序

  5. sort by key filed • +n以第n欄為key • sort +1 telnos gmk 245-3209 arm 333-3903 kc 362-4993

  6. sort-c • 檢查是否己排序 • sun4330% sort -c telnos sort: disorder: gmk 245-3209

  7. sort -n • 比較數字 • sort -n numbs 5 40 300 2000 10000

  8. sort-o outflie • 將結果存到檔案中 • sort telnos > telnos（錯誤） • sort telnos > telnos.tmp mv telnos.tmp telnos • sort -o telnos telnos

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