linux - 使用 grep 或 sed 从匹配行中删除正则表达式组

Question

我有一个文件，内容如下:

- 2 equal files of size 288903252
- 2 equal files of size 284164096
  "C:\E\100p disk util bak\Softwares\OSs\gparted-live-0.26.1-1-i686.iso"
  "H:\Softwares\Linux\gparted-live-0.26.1-1-i686.iso"
- 2 equal files of size 277436598
- 2 equal files of size 161356649
  "H:\Softwares\Dev Tools\Eclipse\Windows\eclipse-java-luna-SR1a-win32-x86_64.zip"
- 35 equal files of size 97078976
  "C:\Windows\System32\DriverStore\FileRepository\nvacwu.inf_amd64_9934c34dc6ca0c4b\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvamwu.inf_amd64_d4715679184092a8\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvaowu.inf_amd64_785608ed2524cdea\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvblwu.inf_amd64_31f54e2d1ba058d5\NvCplSetupInt.exe"

我想删除那些带有 - X equal files of size 的行，但后面没有实际的文件路径。例如第一个和第三个要点:

- 2 equal files of size 284164096
  "C:\E\100p disk util bak\Softwares\OSs\gparted-live-0.26.1-1-i686.iso"
  "H:\Softwares\Linux\gparted-live-0.26.1-1-i686.iso"
- 2 equal files of size 161356649
  "H:\Softwares\Dev Tools\Eclipse\Windows\eclipse-java-luna-SR1a-win32-x86_64.zip"
- 35 equal files of size 97078976
  "C:\Windows\System32\DriverStore\FileRepository\nvacwu.inf_amd64_9934c34dc6ca0c4b\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvamwu.inf_amd64_d4715679184092a8\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvaowu.inf_amd64_785608ed2524cdea\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvblwu.inf_amd64_31f54e2d1ba058d5\NvCplSetupInt.exe"

我组成了一个regex匹配这些行:

(^-.*\n)-

可以在上面的链接中进行检查。我想删除基本上是整行的第一组。但无法猜测我如何使用 grep 或 sed 执行相同的操作。我们可以在单个命令中执行此操作吗？

Answer 1

使用 sed

sed '/^-/{N;/\n-/D}' file

- 2 equal files of size 284164096
  "C:\E\100p disk util bak\Softwares\OSs\gparted-live-0.26.1-1-i686.iso"
  "H:\Softwares\Linux\gparted-live-0.26.1-1-i686.iso"
- 2 equal files of size 161356649
  "H:\Softwares\Dev Tools\Eclipse\Windows\eclipse-java-luna-SR1a-win32-x86_64.zip"
- 35 equal files of size 97078976
  "C:\Windows\System32\DriverStore\FileRepository\nvacwu.inf_amd64_9934c34dc6ca0c4b\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvamwu.inf_amd64_d4715679184092a8\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvaowu.inf_amd64_785608ed2524cdea\NvCplSetupInt.exe"
  "C:\Windows\System32\DriverStore\FileRepository\nvblwu.inf_amd64_31f54e2d1ba058d5\NvCplSetupInt.exe"

任何版本sed的便携版

sed -e '/^-/{N' -e '/\
-/D' -e '}' file

如果你想删除最后一行如果是-

sed -e '/^-/{$d' -e 'N' -e '/\
-/D' -e '}' file