08-13-2009
Quote:
Originally Posted by
shadowfaxxxx
- I can't install Java VM without X window in Core Install level.
This requirement is about java needing the X11 libraries to handle graphics on Unix. It has nothing to do with the administrator using or not a GUI.
Quote:
It's asking me a lot of X11, X window packages to install. Is it defined at somewhere how to install Java VM ?
Each package knows its requirements.
Quote:
Jboss AS 4.2 needs Java VM.
Obviously. Application servers are build on top of java.
Quote:
- As I wrote in my last email, I dont want to use the X Window GUI neither want to install it.
X Window is not exactly a GUI, more a network protocol and the libraries and server that go with it. CDE, Gnome, and X11 based applications are GUIs.
Quote:
This approach is correct ?
It's up to you. Installing the GUI (CDE/Gnome) isn't a requirement for installing most applications. Enabling it is very unlikely to ever be a requirement.
Quote:
Or UNIX admins are always installing X Win inevitable but are only using the text console ?
Unix admins are using the tools that best suit their needs. That might be the console or web browsers or graphic applications or whatever. I don't get you point about GUIs. If an admin is using multiple text consoles on his desktop, he is definitely taking advantage of a GUI. Of course, security aware admins avoid to run a desktop environment as root if that is what you are concerned with.
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LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)
NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$SHELL -c". This doesn't work as intended:
ssh host touch 'hi there' # fails
It creates 2 files, hi and there. Instead, do this:
cmd=`shell-quote touch 'hi there'`
ssh host "$cmd"
This gives you just 1 file, hi there.
process find output
It's not ordinarily possible to process an arbitrary list of files output by find with a shell script. Anything you put in $IFS to
split up the output could legitimately be in a file's name. Here's how you can do it using shell-quote:
eval set -- `find -type f -print0 | xargs -0 shell-quote --`
debug shell scripts
shell-quote is better than echo for debugging shell scripts.
debug() {
[ -z "$debug" ] || shell-quote "debug:" "$@"
}
With echo you can't tell the difference between "debug 'foo bar'" and "debug foo bar", but with shell-quote you can.
save a command for later
shell-quote can be used to build up a shell command to run later. Say you want the user to be able to give you switches for a command
you're going to run. If you don't want the switches to be re-evaluated by the shell (which is usually a good idea, else there are
things the user can't pass through), you can do something like this:
user_switches=
while [ $# != 0 ]
do
case x$1 in
x--pass-through)
[ $# -gt 1 ] || die "need an argument for $1"
user_switches="$user_switches "`shell-quote -- "$2"`
shift;;
# process other switches
esac
shift
done
# later
eval "shell-quote some-command $user_switches my args"
OPTIONS
--debug
Turn debugging on.
--help
Show the usage message and die.
--version
Show the version number and exit.
AVAILABILITY
The code is licensed under the GNU GPL. Check http://www.argon.org/~roderick/ or CPAN for updated versions.
AUTHOR
Roderick Schertler <roderick@argon.org>
perl v5.16.3 2010-06-11 SHELL-QUOTE(1)