There are many shell implementations available, like sh, bash, c shell, z shell, etc. What can you do with the eval command You'll need to complete a few actions and gain 15 reputation points before being able to upvote
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Instead, you can save this post to reference later. Is the pid of the most recent background command $0 is the name of the shell or shell script Most of the above can be found under special parameters in the bash reference manual
Here are all the environment variables set by the shell For a comprehensive index, please see the reference manual variable index. A bashism is a shell feature which is only supported in bash and certain other more advanced shells It will not work under busybox sh or dash (which is /bin/sh on a lot of distros), or certain other shells like the /bin/sh provided on freebsd.
The shell is the program which actually processes commands and returns output
Most shells also manage foreground and background processes, command history and command line editing. I want to redirect both standard output and standard error of a process to a single file How do i do that in bash?
