linux 30g怎么分区

# 创建主分区 /boot
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-586053311, default 2048): 
Using default value 2048
Last sector, +sectors or +size{K,M,G,T,P} (2048-586053311, default 586053311): +500M

# 创建主分区 /
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (1 primary, 0 extended, 3 free)
   e   extended
Select (default p): p
Partition number (2-4, default 2): 2
First sector (526336-586053311, default 526336): 
Using default value 526336
Last sector, +sectors or +size{K,M,G,T,P} (526336-586053311, default 586053311): +15G

# 创建扩展分区
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (2 primary, 0 extended, 2 free)
   e   extended
Select (default p): e
Partition number (3-4, default 3): 3
First sector (1610612736-586053311, default 1610612736): 
Using default value 1610612736
Last sector, +sectors or +size{K,M,G,T,P} (1610612736-586053311, default 586053311): 

# 创建逻辑分区 /home
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (2 primary, 1 extended, 1 free)
   l   logical (5 or over)
Select (default p): l
First sector (1610612736-586053311, default 1610612736): 
Using default value 1610612736
Last sector, +sectors or +size{K,M,G,T,P} (1610612736-586053311, default 586053311): +10G

# 创建逻辑分区 /var
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (2 primary, 1 extended, 0 free)
   l   logical (5 or over)
Select (default p): l
First sector (2621440000-586053311, default 2621440000): 
Using default value 2621440000
Last sector, +sectors or +size{K,M,G,T,P} (2621440000-586053311, default 586053311): +2G

# 创建交换分区
sudo fdisk /dev/sdb
Command (m for help): n
Partition type:
   p   primary (2 primary, 1 extended, 0 free)
   l   logical (6 or over)
Select (default p): l
First sector (2821109904-586053311, default 2821109904): 
Using default value 2821109904
Last sector, +sectors or +size{K,M,G,T,P} (2821109904-586053311, default 586053311): +2G

# 保存并退出
Command (m for help): w

# 格式化分区
sudo mkfs.ext4 /dev/sdb1
sudo mkfs.ext4 /dev/sdb2
sudo mkfs.ext4 /dev/sdb5
sudo mkfs.ext4 /dev/sdb6
sudo mkswap /dev/sdb7

# 挂载分区
sudo mount /dev/sdb1 /boot
sudo mount /dev/sdb2 /
sudo mount /dev/sdb5 /home
sudo mount /dev/sdb6 /var

# 启用交换分区
sudo swapon /dev/sdb7

# 更新/etc/fstab文件
echo "/dev/sdb1 /boot ext4 defaults 0 2" | sudo tee -a /etc/fstab
echo "/dev/sdb2 / ext4 defaults 0 1" | sudo tee -a /etc/fstab
echo "/dev/sdb5 /home ext4 defaults 0 2" | sudo tee -a /etc/fstab
echo "/dev/sdb6 /var ext4 defaults 0 2" | sudo tee -a /etc/fstab
echo "/dev/sdb7 none swap sw 0 0" | sudo tee -a /etc/fstab