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lang-bash
shopt progcomp), bash will try to complete not only commands, but also command line switches (and guess --most of the time wrong ;-) -- when some commands and filenames cannot be used).shopt progcomp. Maybe it's a default option…?shopt progcompwill tell you if it's enabled or not. It's enabled by default on eg. debian.shopt progcomp-- it will answer withprogcomp onorprogcomp off. You can useshopt -s progcompto enable it, andshopt -u progcompto disable it.