tr命令是Linux/Unix中的经典文本处理命令名字来源于“translate”转换作用对标准输入字符进行一对一的替换、删除或压缩。基本语法tr [选项] 字符集1 [字符集2]示例rainLAPTOP-IIB6PKR5:~$ echo Hello | tr e E # 将Hello中的e换成大写的E然后再输出 HEllorainLAPTOP-IIB6PKR5:~$ echo Hello | tr el EL # 替换多个字符 即将所有的e替换成大写E所有小写l替换成大写L HELLorainLAPTOP-IIB6PKR5:~$ echo Hello World | tr a-z A-Z # 大小写转换 a-z和A-Z不是正则表达式而是字符集character set或字符范围 HELLO WORLDrainLAPTOP-IIB6PKR5:~$ echo Hello 123World | tr -d 0-9 # 删除数字 Hello WorldrainLAPTOP-IIB6PKR5:~$ echo -e Hello\nWorld Hello World rainLAPTOP-IIB6PKR5:~$ echo -e Hello\nWorld | tr -d \n HelloWorldrainLAPTOP-IIB6PKR5:~$rainLAPTOP-IIB6PKR5:~$ echo -e Hello\nWorld | tr -d \n HelloWorldrainLAPTOP-IIB6PKR5:~$ rainLAPTOP-IIB6PKR5:~$ echo $PATH | tr : \n # 将冒号替换成换行符原先echo $PATH输出的结果是每个路径被:分隔现在是被换行符分隔使得输出更加清晰直观 /run/user/1000/fnm_multishells/411_1778220590215/bin /home/rain/.local/share/fnm /usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin /usr/games /usr/local/games /usr/lib/wsl/lib /mnt/c/Program Files (x86)/Common Files/Oracle/Java/javapath /mnt/c/Program Files/Common Files/Oracle/Java/javapath /mnt/c/Windows/system32 /mnt/c/Windows /mnt/c/Windows/System32/Wbem /mnt/c/Windows/System32/WindowsPowerShell/v1.0/ /mnt/c/Windows/System32/OpenSSH/ /mnt/c/Program Files (x86)/NVIDIA Corporation/PhysX/Common /mnt/c/Program Files/NVIDIA Corporation/NVIDIA App/NvDLISR /mnt/c/Program Files/dotnet/ /mnt/d/Users/Admin/AppData/Local/Programs/MiKTeX/miktex/bin/x64 /mnt/d/chromedriver/chromedriver-win64 /mnt/d/Windows Kits/10/Windows Performance Toolkit/ /mnt/d/CodeFamily/JDK25/bin /mnt/d/CodeFamily/jdk1.8.0_281/bin /mnt/d/MinGW/mingw64/bin /mnt/d/CodeFamily/Python/Python314/Scripts/ /mnt/d/CodeFamily/Python/Python314/ /mnt/c/Users/Admin/AppData/Local/Microsoft/WindowsApps /mnt/d/Python Files/PyCharm 2025.1.1.1/bin /mnt/d/Program Files/JetBrains/DataGrip 2025.1.2/bin /mnt/d/Program Files/JetBrains/CLion 2025.1.1/bin /mnt/d/Users/Admin/AppData/Local/Programs/Microsoft VS Code/bin /mnt/d/APP Program/Fiddler /mnt/d/MinGW/mingw64/bin /snap/bintr与sed的区别特性trsed处理单位单个字符字符串/正则表达式功能复杂度简单只能字符映射强大支持正则、条件、脚本速度更快较慢适用场景简单字符替换/删除/压缩复杂文本处理