In Conda's manual for Travis integration, what does hash -r do and is it necessary?
miniconda and Travis, what does hash -r do?
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hashis a bash builtin.hash -rwill rescan the$PATHfor available executable commands, so Bash knows what to execute when you type a command name.According to
man bash, if type in a command, Bash will first search its internal data structure for which command to execute. If that fails, it will make a search in the$PATH.It seems to me that this call to
hash -ris unnecessary.