Why does POSIX require certain shell built-ins to have an external implementation?
10945
What is the point of the `cd` external command?
40817
Porting Linux shell scripts
18997
POSIX compliant way to redirect stdout and stderr to a file
33687
Why is echo a shell built in command?
137445
Why is $ the default symbol for a user shell and # the default symbol for a root shell?
23117
Why do we need extern "C"{ #include  } in C++?
51448
How do new package versions find their way to the LTS distribution? (Current example: OpenSSL)
15611
How do I execute a command and get the output of the command within C++ using POSIX?
106943
Object-oriented shell for *nix
132222
Why does /bin/sh behave differently to /bin/bash even if one points to the other?
107584
How can I set Perl's inclusion path for modules for a CGI script?
91653
Why does `at` warn me that commands will be executed using /bin/sh? What if I want a different shell?
50925
How portable are /dev/stdin, /dev/stdout and /dev/stderr?
98117
If processes inherit the parent's environment, why do we need export?
40827
Ask for a password in POSIX-compliant shell?
130191
Why isn't the first executable in my $PATH being used?
30884
Determine direct shared object dependencies of a Linux binary?