Command Filter的意思|示意

You could open up an app like Synaptic and set a filter to show everything marked as "installed", or you could do it quickly and easily from the command line with DPKG.

你可以打开一个像Synaptic的程序并设置一个过滤来显示所有标记为“已安装”的程序，或者你也可以通过命令行用dpkg快速简单地完成这一工作。

Command line access to filter and format.

命令行访问，支持过滤和格式化。

Mkfilt: This is a key command that allows us to activate or deactivate the filter rules in the table, enable or disable logging for filters, and change the default rules.

mkfilt：这是一个重要的命令，它可以激活或停用表中的过滤规则，启用或禁用过滤日志，并改变默认规则。

Use the xargs tool as a filter for making good use of output culled from the find command.

使用xargs工具作为筛选器，以充分利用从find命令挑选的输出。

If you do have a filter that requires input from stdin, you might think of using the cat command to copy the file to stdout, which would work.

如果您有要求来自 stdin 的输出的过滤器，那么可以考虑使用 cat 命令将文件复制到 stdout。

Our final sed example uses the = command to print line numbers and then filter the resulting output through sed again to mimic the effect of the nl command to number lines.

最后一个 sed 示例使用 = 命令输出行号，然后再次使用 sed 过滤生成的输出，以模拟使用 nl 命令对行进行编号的效果。