All directories under the windows folder have two dots?

I executed the ls-rf command with gitbash under windows10"s computer and found that there is a. / a.. / file under each directory (I judged these two files by php"s is_file). It"s strange, what is this?

Apr.09,2021

this is true. You can also see these two special directories under the cmd terminal by using the dir command.

if you have learned a little bit about directory tree structure, you should know that there will be two special directories under each directory, . points to the directory itself, and .. points to the directory one level above, thus forming an inverted tree structure. That's where it came from. This is also common in the posix environment

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c23cfe-33684.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c23cfe-33684.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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