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Full Discussion: Cd
Top Forums UNIX for Dummies Questions & Answers Cd Post 7924 by Perderabo on Wednesday 3rd of October 2001 01:52:08 PM
Old 10-03-2001
I do see that language on the sun man page. Hp's man page is more rational:
Quote:
cd exists only as a shell built-in command because a new process is created whenever a command is executed, making cd useless if written and processed as a normal system command.
That language preceeds the existence of /usr/bin/cd, they should now drop the "only" from the sentence.

With HP-UX, 10.0 was the first release to have /usr/bin/cd. No earlier version of HP-UX had one.
It really is new. It was never used by any shell. There is no way to write a shell that uses /usr/bin/cd. There never was any way to write a shell that uses /usr/bin/cd in any release of any version of unix. /usr/bin/cd is virually useless.
 
GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The 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 /bin/cat'' it will create the following two files: -r-xr-xr-x 1 root bin 9644 Feb 11 11:16 /bin/cat -r-xr-xr-x 1 bin bin 24576 Nov 23 13:21 /bin/cat~ /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file. You can remove /bin/cat~ once you are sure that /bin/cat works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
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 other utilities (tail, chmod, ln, sleep). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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