How Do I Programmatically Check for a Program's Existence?

How Do I Programmatically Check for a Program's Existence?

unix language-agnostic

unix

Fetching files from remote server - Perl/Unix

perl unix

unix

UF_TRACKED file flag from stat.h

macos unix filesystems osx-lion hfs

unix

I want to delete all files matching 'a.*' if the used disk space in /tmp exceeds 50%

unix solaris diskspace

unix

Passing many environment variables to Rails application ran by Unicorn

ruby-on-rails shell unix environment-variables unicorn

unix

I have to rename all file names with first word of their content in unix

file unix command rename

unix

How to view all ( including hidden ) subdirectories

bash shell unix ls

unix

Create a process whose ruser and user are different

linux perl unix

unix

how to save ouput of perf (Linux tool) to a file?

linux bash unix ubuntu

unix

Are all reentrant functions safe to use after fork()ing in a multithreaded(with pthreads) process?

unix pthreads fork

unix