Permissions and file
Competence
Linux system is divided into the owner's permissions, user groups and others three categories.
Each category has r read, write, and W x execute three permission, permission for each number 1, 2, 4
Directory and file permissions Description
| Package | content | r | w | x |
|---|---|---|---|---|
| file | detailed data | Read the contents of the file | Modify the contents of the file | Execute the file contents |
| table of Contents | file name | Read the file name | Modify the file name | The directory access rights |
Modify Permissions command
chgrp 修改文件组
chown 修改所有者
chmod 修改文件权限
chmod 777 /demo
754 指的是：所有者权限 1 + 2 + 4 用户组权限 1 + 0 + 4 其他人权限 0 + 0 + 4File and directory commands
ls 列出文件
mkdir 创建目录
rmdir 删除空目录
cd 切换目录
pwd 显示当前目录
touch 创建文件
more/head/tail 显示文件内容
rm 删除文件或者文件夹
cp 复制文件
mv 移动文件
file 观察文件
whereis 查找文件
tree 目录树Mount Disk
Step 1. Partition
lsblk / blkid output disk device information
fdisk / gdisk MBR partition using fdisk, GPT partition uses gdisk
Step 2. Disk Format
mkfs formatted disk, formatted using e.g. mkfs.xfs, mkfs.ext4 command to the file system, etc.
Step 3. Mount Disk
Mount point for the directory, you must first create a mount directory, and then use the mount command device information obtained in accordance with Step 1 to mount
View Directory Usage
df 查看文件系统的整体使用情况
du 查看文件系统的磁盘使用量（常用在查看目录所在磁盘情况）