tldr/pages/common/sponge.md

# sponge

> Soak up the input before writing the output file.
> More information: <https://manned.org/sponge>.

- Append file content to the source file:

`cat {{path/to/file}} | sponge -a {{path/to/file}}`

- Remove all lines starting with # in a file:

`grep -v '^{{#}}' {{path/to/file}} | sponge {{path/to/file}}`
sponge: add page (#4117) 2020-06-20 11:41:03 +08:00			`# sponge`

			`> Soak up the input before writing the output file.`
multiple pages: replace all die.net links (#5528) Most of the links were replaced by manned.org, except when there are more up-to-date sources (like `ifup`) or first-party sources (like `sftp`). 2021-04-16 16:42:14 +02:00			`> More information: <https://manned.org/sponge>.`
sponge: add page (#4117) 2020-06-20 11:41:03 +08:00
			`- Append file content to the source file:`

			`cat {{path/to/file}} \| sponge -a {{path/to/file}}`

			`- Remove all lines starting with # in a file:`

			`grep -v '^{{#}}' {{path/to/file}} \| sponge {{path/to/file}}`