sponge (1) - Linux Man Pages
sponge: soak up standard input and write to a file
NAMEsponge - soak up standard input and write to a file
SYNOPSISsed '...' file | grep '...' | sponge file
DESCRIPTIONsponge reads standard input and writes it out to the specified file. Unlike a shell redirect, sponge soaks up all its input before opening the output file. This allows constructing pipelines that read from and write to the same file.
It also creates the output file atomically by renaming a temp file into place, and preserves the permissions of the output file if it already exists. If the output file is a special file or symlink, the data will be written to it.
AUTHORColin Watson and Tollef Fog Heen
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