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man-db is already the newest version. enter image description here

shopt can run,but no man shopt info. enter image description here

  • 1) Please don't post pictures of text; 2) shopt is a Bash builtin - see this question (possible dupe?) for guidance. – Michael Homer Jan 30 '17 at 2:00
  • Just write shopt and hit enter and you will see the list of args that you can pass to it. – zee Jan 30 '17 at 3:34
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shopt is a bash builtin. If you run which shopt, you will see that there isn't actually a command called "shopt". Thus man shopt makes as little sense as man cd. The descriptions of how shopt and cd work belong in man bash.

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