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tldr/pages/common/tac.md

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# tac
> Display and concatenate files with lines in reversed order.
> See also: `cat`.
> More information: <https://www.gnu.org/software/coreutils/manual/html_node/tac-invocation.html>.
- Concatenate specific files in reversed order:
`tac {{path/to/file1 path/to/file2 ...}}`
- Display `stdin` in reversed order:
`{{cat path/to/file}} | tac`
- Use a specific separator:
`tac {{[-s|--separator]}} {{separator}} {{path/to/file1 path/to/file2 ...}}`
- Use a specific regex as a separator:
`tac {{[-r|--regex]}} {{[-s|--separator]}} {{separator}} {{path/to/file1 path/to/file2 ...}}`
- Use a separator before each file:
`tac {{[-b|--before]}} {{path/to/file1 path/to/file2 ...}}`