gzexe utility allows you to compress executables in place and have them
automatically uncompress and execute when you run them (at a penalty
in performance). For example if you execute gzexe /usr/bin/gdb it
will create the following two files:
-rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb
-rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~
/usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing
executable file. You can remove /usr/bin/gdb~ once you are sure that
/usr/bin/gdb works properly.
This utility is most useful on systems with very small disks.
The compressed executable is a shell script. This may create some
security holes. In particular, the compressed executable relies
on the PATH environment variable to find
gzip and some standard utilities