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                [TOC] ### 當前目錄下文件個數(含遞歸) `find ./ | wc -l` ### 文件按照修改時間排序 `alias lsl='ls -lrt'` ### find 查找目錄及文件 #### find 模糊查找 `find ./ -name '*.o'` #### 遞歸當前目錄及子目錄刪除所有.o文件 `find ./ -name "*.o" -exec rm {} \;` ### locate 查找目錄及文件 1. find是實時查找,如果需要更快的查詢 2. locate會為文件系統建立索引數據庫,如果有文件更新,需要定期執行更新命令來更新索引庫: 安裝 ``` sudo yum install locate ``` ### 用tr進行轉換 ``` echo 12345 | tr '0-9' '9876543210' //加解密轉換,替換對應字符 cat text| tr '\t' ' ' //制表符轉空格 ``` #### 刪除所有數字 `cat file | tr -d '0-9' ` #### 壓縮多余的空格 `cat file | tr -s ' ' ` ### paste 按**列**拼接文本 cat file1 ``` 1 2 ``` cat file2 ``` colin book ``` ``` > paste file1 file2 1 colin 2 book > paste file1 file2 -d "," 1,colin 2,book ``` ### wc 統計行和字符的工具 ``` > wc test.txt 5 26 64 test.txt > wc -l test.txt // 統計行數 5 test.txt > wc -c test.txt // 統計單詞數 64 test.txt > wc -w test.txt // 統計字符數 26 test.txt ```
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