How does git remove the version library control of specified files without letting others delete files after they are updated?

RT
after adding the file already in the version library to the .gitignore file, execute the following command:

git rm -r --cached .
git add .

then comment deletes the file!

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-64f5-1b3835e-2c0eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3835e-2c0eb.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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