Bash is the GNU Project's shell. Bash is the Bourne Again SHell. Bash is an sh-compatible shell that incorporates useful features from the Korn shell (ksh) and C shell (csh). It is intended to conform to the IEEE POSIX P1003.2/ISO 9945.2 Shell and Tools standard. It offers functional improvements over sh for both programming and interactive use. In addition, most sh scripts can be run by Bash without modification.
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SystemTap is an instrumentation system for systems running Linux. Developers can write instrumentation scripts to collect data on the operation of the system. The base systemtap package contains/requires the components needed to locally develop and execute systemtap scripts.
A set of basic GNU tools commonly used in shell scripts
These are the GNU core utilities. This package is the combination of the old GNU fileutils, sh-utils, and textutils packages.
Programmable system-wide instrumentation system - client
This package contains/requires the components needed to develop systemtap scripts, and compile them using a local systemtap-devel or a remote systemtap-server installation, then run them using a local or remote systemtap-runtime. It includes script samples and documentation, and a copy of the tapset library for reference.