04-12-2010
Why do a unix script starts with a comment?
For eg:
#!/usr/bin/ksh
<remaining code goes here>
..
..
Does the compiler ignores that?
Thanks
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi all,
please help me how to comment multiple lines in unix script.
thanks in advance
--bali (3 Replies)
Discussion started by: balireddy_77
3 Replies
2. What is on Your Mind?
Here is the famous line 2238 of Unix V6 which is part of some of the most delicate parts of the kernel, context switching.
This comment received huge publicity and just may be the the most famous source code comment in computing history.
2230 /*
2231 * If the new process paused because it... (0 Replies)
Discussion started by: Neo
0 Replies
3. Shell Programming and Scripting
Hi All,
I have to kill a program whose pid, i will be getting.
Multiple processes will be getting started by my script of same kind in a series.
So for after each call to a process i need to write a command or script which can kill the process if it takes more than 5min. In this i will... (3 Replies)
Discussion started by: nishank.jain
3 Replies
4. Shell Programming and Scripting
1) Comment utiliser les commandes shelll unix pour recherche sur windows vista, est-ce possible et dans ce cas comment
2) comment exécuter un .ksh ou .bat sous putty, j'ai essayé mais je reçois le message
ksh: ./: 0403-006 Execute permission denied. lors de la commande ./ testx
Merci d'avance (5 Replies)
Discussion started by: infosuni0309
5 Replies
5. Shell Programming and Scripting
Howdy,
I'm fairly new at bash scripting, but (for some reason) I've been tasked with building a bastion server and logging all (ssh/telnet) remote activity. Each session must create a unique log file - the name of each file must include the user ID, the connection method (ssh/telnet), the name... (2 Replies)
Discussion started by: kilo90
2 Replies
6. Shell Programming and Scripting
Dear community,
what I'm try to do is deny users to run a script without parameters from command bash, but the same script should run without parameters only from crontab.
Example runs by crontab:*/5 * * * * /tmp/script.sh
Here the normal execution starts every 5 minutes
Example #1 runs by... (16 Replies)
Discussion started by: Lord Spectre
16 Replies
7. Shell Programming and Scripting
I have tried a lot, Need your help guys.
SAS Program:
data one ; /* Data step */
Input name $; /*Dec variables*/
I want to remove the commented part(/* Data step */) alone. I have tried using sed command but it is deleting the entire line itself. i need unix command to separate this and... (6 Replies)
Discussion started by: saaisiva
6 Replies
8. UNIX for Advanced & Expert Users
hello,
can someone please suggest a script to rename a file that was generated today and filename that being generated daily starts with date, its a xml file.
here is example.
# find . -type f -mtime -1
./20130529_4995733057260357019.xml
#
this finename should be renamed to this format.... (6 Replies)
Discussion started by: bobby320
6 Replies
9. Homework & Coursework Questions
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: It's a shell script using a looping logic, trap, tput, if, while. Most of the scripts in this book aren't written... (2 Replies)
Discussion started by: ckleinholz
2 Replies
10. Shell Programming and Scripting
This is on a CentOS box, I have two scripts that need to run in order.
I want to write a shell script that calls the first script, lets it run and then terminates it after a certain number of hours (that I specify of course), and then calls the second script (they can't run simultaneously) which... (3 Replies)
Discussion started by: btramer
3 Replies
shells(4) File Formats shells(4)
NAME
shells - shell database
SYNOPSIS
/etc/shells
DESCRIPTION
The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.
A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by the routines
which search the file. Blank lines are also ignored.
The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/pfcsh, /bin/pfksh, /bin/pfsh, /bin/sh,
/bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/pfcsh, /usr/bin/pfksh,
/usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh. Note that /etc/shells overrides the default list.
Invalid shells in /etc/shells may cause unexpected behavior (such as being unable to log in by way of ftp(1)).
FILES
/etc/shells lists shells on system
SEE ALSO
vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)
SunOS 5.10 4 Jun 2001 shells(4)