ubuntu里面/etc/profile里面最后一行有个<F5>umask 022是啥意思啊？

Posted 2023-03-15

Setting the user file-creation mask (umask) to 022 ensures that newly created files and directories are only writable by their owner, but are readable and executable by anyone (assuming default modes are used by the open(2) system call, new files will end up with permission mode 644 and directories with mode 755).这是摘自LFS的原话，意思就是新创建的文件和文件夹只能被所有者改写，而可以被任何人读取和执行。 参考技术A 用来设置文件或目录的默认权限。