<div>
Are you sure you are running it in bash and not in sh?
</div>


Are you sure you are running it in bash and not in sh?

<div>
you're right i was using /bin/sh, i changed it to #!/usr/local/bin/bash .. now it works but the if, or while does not turn on at echo ${cnickname:0:1} | grep [:digit:]; when i put something like '3blah'
</div>


you're right i was using /bin/sh, i changed it to #!/usr/local/bin/bash .. now it works but the if, or while does not turn on at echo ${cnickname:0:1} | grep [:digit:]; when i put something like '3blah'

<div>
worked<br />
i know i might sound very stupid, but, why didn't it worked with /bin/sh and it works with /bin/bash ?<br />
whats the difference ? (i am making some scripts on a server, like getegg getpsy etc (for irc) using dialog menu)
</div>


worked
i know i might sound very stupid, but, why didn't it worked with /bin/sh and it works with /bin/bash ?
whats the difference ? (i am making some scripts on a server, like getegg getpsy etc (for irc) using dialog menu)

<div>
<div class="content wysiwyg-content">
while [ -z $cnickname ] || echo ${cnickname:0:1} | grep [:digit:];<br />
do<br />
if echo ${cnickname:0:1} | grep [:digit:]; then<br />
something<br />
<br />
When i execute this it says: Syntax error: Bad substitution, any ideea whats wrong ?<br />
The script should take the virst letter of $cnickname and see if its a digit, and if it is do something<br />

</div>
</div>


while [ -z $cnickname ] || echo ${cnickname:0:1} | grep [:digit:];
do
if echo ${cnickname:0:1} | grep [:digit:]; then
something

When i execute this it says: Syntax error: Bad substitution, any ideea whats wrong ?
The script should take the virst letter of $cnickname and see if its a digit, and if it is do something


Bash - check the first letter of a var

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.

Linux

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.