bash check if environment variable is set

by Radhe Gupta
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If you set the bash environment variable “PRETTYIE_PATTERN” then you will get bash errors that you can’t solve.

PrettyIE is a bash script that creates and applies a pretty-good looking bash theme to standard output. PrettyIE is a part of the new Ubuntu desktop theme that is available for use with Ubuntu Linux. PrettyIE uses the bash shell and can use pretty much everything that is supported in the bash shell, including things like setting environment variables, invoking scripts, and executing commands. PrettyIE is free software and requires the bash interpreter 1.0 or newer.

PrettyIE is just one of many tools that are included with Ubuntu so it can run on pretty much any system supported by Ubuntu. If you want to get your bash shell to look nice and have a good theme, then you can install the pretty-bash-theme package from the Ubuntu Software Center or from PrettyIE is also available separately as a package for Mac OS X and Windows.

bash is a command interpreter like any other. It’s just a more advanced shell. PrettyIE is a full-featured shell that can run pretty much any command and will let you customize the theme and the colors. It also includes a pretty good default shell for pretty much any system that supports bash.

The thing is that the environment variable is set in the shell’s global scope. If you call PrettyIE from a shell that is set to a different shell, it will still use the global environment variable. Setting the environment variable in a shell that is set to another shell will have no effect.

That’s kind of a bummer because we could all use a shell with a default environment variable from a lot of different places. For example, if you’re using Bash as the default shell, you could call pretty.sh with your favorite color scheme. If you’re using TextMate, you could call pretty.sh with your favorite font.

One of the many reasons why we’re using Bash is because it’s the easiest way to set a default environment variable. If you want a completely different environment, you can use the setenv command. Setenv doesn’t affect the global environment variable.

bash is also the default shell on OS X.

To set a different shell, you can use the setenv command. It does not affect the global environment variable. Since it is a command, you can use the -s flag in the setenv command to change which environment variable is used. The two commands are pretty much the same.

bash is the default shell on OS X. I’m not sure if other systems do this as well (or if there are any special reasons for doing so), but it seems like an unnecessary step to me. It also doesn’t work on all systems, so you’ll need to use setenv to set a different environment variable.

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