Hi men,
I think this must be a very common job. "How could to Automatically change to Bash shell after login and then jail user can only using this shell".
I want monitor user works.However it just only effect on Bash shell. Consequently if the user change the shell it will be worthless.
... (4 Replies)
Hi,
I would like to change the font size in bash. I know how do it in ksh:
F_VDOBLE="\033#6"
print "${F_VDOBLE}Esto es..."
But in bash I don't know
Could you help me please?
Many thanks! (5 Replies)
Hey guys.
The problem is :
i need to change encoding (to be more precise UTF-8) or change the language . You see , when i log in , manuals are shown in 'Some symbols' (being written in 'Not English') and its very confusing to work. Please Help :) (3 Replies)
It looks like,
user@hostname:/auto/home3/user$
Desired,
user@hostname$
I added following line in .bashrc, but still its same.
export PS1=" $ "
Please help me :confused: (13 Replies)
Say you got a for loop where each execution has 0 dependence on the other. Thus ideally you'd like to executed them all concurrently rather than iteratively (if you had enough CPUs). We don't quite have that many CPUs but I would like to instead partition the iterations between them.
Or maybe... (10 Replies)
I have the below bash which runs great. Before I make a change I wanted to check with experts (as I am not one). After the perl code completes, I am going to display "annotation complete" then go into the remove function .
annovar() {
# combine id and position files
cd... (2 Replies)
So I'm trying to pass certain json elements as env vars and use them later on in a script.
Sample json:
JSON='{
"Element1": "file-123456",
"Element2": "Name, of, company written in, a very weird way",
"Element3": "path/to/some/file.txt",
}'
(part of the) script:
for s... (5 Replies)
Hi,
I have been trying to execute the below command by changing directory and then copying contents of one directory to another by doing some file name manipulations in between. However this isnt working since as soon as the statement completes it goes back to the original folder. Can someone... (5 Replies)
In Bash shell - the ps -ef shows only the /bin/bash but the script name is not displayed ? Is there any way to get the script names for the process command ?
--- Post updated at 08:39 AM ---
in KSH (Korn Shell), my command output shows the script names but when run in the Bash Shell... (3 Replies)
Discussion started by: i4ismail
3 Replies
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)