Les options :
zip [-options] [-b path] [-t mmddyyyy] [-n suffixes] [zipfile list] [-xi list]
The default action is to add or replace zipfile entries from list, which can include the special name - to compress standard input. If zipfile and list are omitted, zip compresses stdin to stdout.
-f freshen: only changed files -u update: only changed or new files
-d delete entries in zipfile -m move into zipfile (delete files)
-r recurse into directories -j junk (don't record) directory names
-0 store only-l convert LF to CR LF (-ll CR LF to LF)
-1 compress faster-9 compress better
-q quiet operation-v verbose operation/print version info
-c add one-line comments -z add zipfile comment
-@ read names from stdin -o make zipfile as old as latest entry
-x exclude the following names -i include only the following names
-F fix zipfile (-FF try harder) -D do not add directory entries
-A adjust self-extracting exe -J junk zipfile prefix (unzipsfx)
-T test zipfile integrity -X eXclude eXtra file attributes
-y store symbolic links as the link instead of the referenced file
-R PKZIP recursion (see manual)
-h show this help -n don't compress these suffixes

Remarque : Pour comprimer le répertoire projetdb, il faut se placer au dessus de la racine dans une fenêtre xterm :

Exemple :
[cr@localhost java]# zip projetdb.zip -r projetdb/