je to build-in fce bashe (konkretni implementace vaseho shellu, teda aspon predpokladam, ze pouzivate BASH)
Jednoduse si nakesuje absolutni cestu k souboru. Dulezite je ale posledni veta v dokumentaci:
hash [-lr] [-p filename] [-dt] [name]
For each name, the full file name of the command is determined by searching the directories in $PATH and remembered. If the -p option is supplied, no path search is performed, and filename is used as the full file name of the command. The -r option causes the shell to forget all remembered locations. The -d option causes the shell to forget the remembered location of each name. If the -t option is supplied, the full pathname to which each name corresponds is printed. If multiple name arguments are supplied with -t, the name is printed before the hashed full pathname. The -l option causes output to be displayed in a format that may be reused as input. If no arguments are given, or if only -l is supplied, information about remembered commands is printed. The return status is true unless a name is not found or an invalid option is supplied.
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Je tu jasne definovane chovani, kdyz ne/najde soubor na FS.
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