Hi,
i am new to UNIX. I have couple of basic questions.
1. Is the syntax for BASH shell programming same in the LINUX and SUN SOLARIS operating systems?
2. I have to work on BASH shell programming in SUN SOLARIS operating system. I am going through the documentation from the following... (4 Replies)
Can any1 please help me...
i'm really lost in using bash shell scripting...
and i got to hand this up on monday...
please anyone teach me how to do this assignment...
Please use basic things because i just learn the program only... thanks
... (1 Reply)
Everything else seems to be working, but this isn't. Is it the "cat..." that is wrong of the condition? Thanks.
cat tc_result.txt | while read LINE
do
if
then
let "files_run += 1";
echo "inside the if loop"
# save current filetype
case $LINE... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Write a bash shell script that takes as an argument a name. Then your script will ask the user for two numbers.... (15 Replies)
Hello All,
I am setting up a cron job, where i am calling a shell script to make few builds. I got struck at a point, need some expert inputs to proceed further.
The script is categorized in 5 parts and in the last part while building software it asks for few questions like:-
1. Build mode... (4 Replies)
I do not know shell scripting. But at work place, I have got an in and out shell scripting task. I just need to understand a very big script. Is there any tool in which I can place the script and it can tell me the meaning of the whole script? (3 Replies)
Can anyone please assist me?
I have attached 2 input files and one output file. I need to generate the sql update statements using the above 2 input files. if inputfile2 has 5 rows, then we should generate 5 update statements because column1 is unique. inputfile1 and inputfile2 may contain more... (10 Replies)
Foe example we have three environments int,qa and prod.Each environment has some number of servers.
int=Server1,Server2,Server3
qa=Server4,Server5,Server6
prod=Server7,Server8,Server9
echo "Enter the Environment i.e int,qa,prod"
read env
case $env in
int)
## Need command where all the... (9 Replies)
Discussion started by: nareshreddy443
9 Replies
LEARN ABOUT CENTOS
shell-quote
SHELL-QUOTE(1) User Contributed Perl Documentation SHELL-QUOTE(1)NAME
shell-quote - quote arguments for safe use, unmodified in a shell command
SYNOPSIS
shell-quote [switch]... arg...
DESCRIPTION
shell-quote lets you pass arbitrary strings through the shell so that they won't be changed by the shell. This lets you process commands
or files with embedded white space or shell globbing characters safely. Here are a few examples.
EXAMPLES
ssh preserving args
When running a remote command with ssh, ssh doesn't preserve the separate arguments it receives. It just joins them with spaces and
passes them to "$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)