http://www.yolinux.com/
This Linux site is dedicated to providing tutorials, help, documentation, on-line training, guides and links for Linux users. 该 Linux 站点致力于为 Linux 用户提供教程、帮助、文档、在线培训、指南和链接。
portal ['pɔːt(ə)l]：n. 大门，入口
cp - copy files and directories - 拷貝文件或目錄 1. DESCRIPTION Copy SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY. 複
du - estimate file space usage - 計算文件空間使用情況 Summarize disk usage of the set of FILEs, recursively for directories.
df - report file system disk space usage - 文件系統磁盤空間使用情況 df displays the amount of disk space available on the file
mv - move (rename) files - 移動或重命名 Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY. --help display this help a
