This length is not absolute, but most linux systems:

The file name is limited to 255 characters;

The path name is limited to 4096 characters;

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Specifically, subjects can execute the following two commands on their own computers to check the length of their local linux system:

Maximum length of file name: getconf NAME_MAX/

Maximum length of path name: getconf PATH_MAX/

The situation on my computer:

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In addition, this information is actually written in a header file named limits.h in linux. If you are interested, you can find it yourself:

find/usr | grep limits . H | xargs-I { } grep-H ' NAME _ MAX ' { }

find/usr | grep limits . H | xargs-I { } grep-H ' PATH _ MAX ' { }

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I hope it can help the subject. Welcome questions.