eneric Bourne doesn't have to support [[ ]]. Some do, some don't, so if you don't know what shell you're going to get, limit yourself to [ ] .
You should also have a blank line as the first line of the script, in case your first line accidentally ends up being a command. [ is a command for instance.
So, really, I reccomend having a shebang even if you don't plan on using it, just in case someone else does, and to at least document which variety of shell is preferred for it.
Code:
#!/bin/sh
[ 1 -eq 1 ] && echo yes || echo no
Last edited by Corona688; 08-31-2012 at 04:32 PM..
Hi,
I am currently writing BASH shell scripts. I am using BASH on a Powerbook G4 running Leopard. Could somebody please explain the difference between
#!/bin/bash and #!/bin/sh?
I have been using the latter (#!/bin/sh), and things have been working fine. But is that the correct one to use... (9 Replies)
Do we need to include the exclamatory mark in the shebang line??:confused:
What if we dont include it??:eek:
Actually what shebang line implies when we run a script??
shebang line--> #!/bin/ksh :p (6 Replies)
Can any one tell me how to replace a shebang line of a file using sed?
Eg: If a file contains the following shebang line
#!C:/InstantRails/ruby/bin/ruby
I would like to replace it with
#!/usr/local/bin/ruby
The shebang line of the file can be obtained from the command
cat... (3 Replies)
*** EDIT: I found something close to my solution under an IIS 7 Module Handle.*****
(Non-Homework question, simply an ease of use one)
Odd question here and maybe its my newness to cgi/Perl, but is it possible to have 2 shebang lines?
I write an test a ton of my homework code on my windows... (1 Reply)
Hi,
I always thought that #!/usr/bin/ksh means that the script would be executed in korn shell i.e. when we'll execute the script with this line as the very first line then the shell spawns a korn shell (in this case as we are using #!/usr/bin/ksh ) and the script gets executed.
But I am... (7 Replies)
Hi,
I have a trivial question to ask, I am seeing in some shell scripts the '-' (hyphen) character following the first line of shell script (i.e) the shebang notation as follows:
#!/bin/sh -
#! /bin/bash -
what does the hyphen signify? What will happen if it is not given explicitly? (2 Replies)
Hi ,
I know about the shebang line in shell scripting. Just want to know whether is there any difference in execution of the program by keeping and not keeping the shebang line. Because without shebang line also the script is working. correct me if am wrong. Any help on this will be helpful (5 Replies)
Discussion started by: rogerben
5 Replies
LEARN ABOUT HPUX
resize
RESIZE(1) General Commands Manual RESIZE(1)NAME
resize - set TERMCAP and terminal settings to current xterm window size
SYNOPSIS
resize [ -u | -c ] [ -s [ row col ] ]
DESCRIPTION
Resize prints a shell command for setting the TERM and TERMCAP environment variables to indicate the current size of xterm window from
which the command is run. For this output to take effect, resize must either be evaluated as part of the command line (usually done with a
shell alias or function) or else redirected to a file which can then be read in. From the C shell (usually known as /bin/csh), the follow-
ing alias could be defined in the user's .cshrc:
% alias rs 'set noglob; eval `resize`'
After resizing the window, the user would type:
% rs
Users of versions of the Bourne shell (usually known as /bin/sh) that don't have command functions will need to send the output to a tempo-
rary file and the read it back in with the ``.'' command:
$ resize > /tmp/out
$ . /tmp/out
OPTIONS
The following options may be used with resize:
-u This option indicates that Bourne shell commands should be generated even if the user's current shell isn't /bin/sh.
-c This option indicates that C shell commands should be generated even if the user's current shell isn't /bin/csh.
-s [rows columns]
This option indicates that Sun console escape sequences will be used instead of the special xterm escape code. If rows and columns
are given, resize will ask the xterm to resize itself. However, the window manager may choose to disallow the change.
FILES
/etc/termcap for the base termcap entry to modify.
~/.cshrc user's alias for the command.
SEE ALSO csh(1), tset(1), xterm(1)AUTHORS
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley)
Copyright (c) 1984, 1985 by X Consortium
See X(1) for a complete copyright notice.
BUGS
The -u or -c must appear to the left of -s if both are specified.
X Version 11 Release 6.3 RESIZE(1)