gzexeutility uses gzip(1) to compress executables, producing executables that decompress on-the-fly when executed. This saves disk space, at the cost of slower execution times. The original executables are saved by copying each of them to a file with the same name with a ‘~’ suffix appended. After verifying that the compressed executables work as expected, the backup files can be removed.
The options are as follows:
- Decompress executables previously compressed by
gzexe program refuses to compress
non-regular or non-executable files, files with a setuid or setgid bit set,
files that are already compressed using
in /bin or /sbin, or
programs it needs to perform on-the-fly decompression:
basename(1), mktemp(1), rm(1), echo(1), tail(1), gzip(1), and chmod(1).
gzexe utility replaces files by
overwriting them with the generated compressed executable. To be able to do
this, it is required that the original files are writable.