June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Shell
We need a shell to run scripts and to give us a command prompt so that we can interact with the system. An interactive shell is probably not necessary in a production device, but it is useful for development, debugging, and maintenance. There are various shells in common use in embedded systems:
- bash: This is the big beast that we all know and love from desktop Linux. It is a superset of the Unix Bourne shell with many extensions or bashisms.
- ash: Also based on the Bourne shell, it has a long history with the BSD variants of Unix. BusyBox has a version of ash, which has been extended to make it more compatible with bash. It is much smaller than bash, and hence it is a very popular choice for embedded systems.
- hush: This is a very small ...
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