我想在现有硬盘或新磁盘上添加 50GB 的额外空间，以适合的为准，但该空间应安装在/home.我的sda2已经安装在/home.我正在使用 RHEL。
$ df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 63G 0 63G 0% /dev
tmpfs 63G 0 63G 0% /dev/shm
tmpfs 63G 3.4G 60G 6% /run
tmpfs 63G 0 63G 0% /sys/fs/cgroup
/dev/mapper/rhel-root 540G 196G 345G 37% /
/dev/mapper/rhel-var 12G 302M 12G 3% /var
/dev/mapper/rhel-home 2.0G 47M 2.0G 3% /home
/dev/sda6 7.0G 83M 7.0G 2% /tmp
/dev/sda7 7.0G 251M 6.8G 4% /var/log
/dev/sda9 7.0G 83M 7.0G 2% /var/tmp
/dev/sda8 7.0G 83M 7.0G 2% /var/log/audit
/dev/sda5 55G 4.7G 51G 9% /xyz
/dev/sda1 2.0G 184M 1.7G 11% /boot
/dev/sda3 1022M 4.0K 1022M 1% /boot/efi
/dev/loop4 318M 318M 0 100% /abc-os
$ fdisk -l
Disk /dev/sda: 700 GiB, 751619276800 bytes, 1468006400 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xe925ee1a
Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 4196351 4194304 2G 83 Linux
/dev/sda2 4196352 1270892543 1266696192 604G 8e Linux LVM
/dev/sda3 1270892544 1272989695 2097152 1G ef EFI (FAT-12/16/32)
/dev/sda4 1272989696 1468006399 195016704 93G 5 Extended
/dev/sda5 1272991744 1388335103 115343360 55G 83 Linux
/dev/sda6 1388337152 1403017215 14680064 7G 83 Linux
/dev/sda7 1403019264 1417699327 14680064 7G 83 Linux
/dev/sda8 1417701376 1432381439 14680064 7G 83 Linux
/dev/sda9 1432383488 1447063551 14680064 7G 83 Linux
$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop4 7:4 0 318M 1 loop /abc-os
sda 8:0 0 700G 0 disk
├─sda1 8:1 0 2G 0 part /boot
├─sda2 8:2 0 604G 0 part
│ ├─rhel-root 253:0 0 540G 0 lvm /
│ ├─rhel-swap 253:1 0 50G 0 lvm [SWAP]
│ ├─rhel-var 253:2 0 12G 0 lvm /var
│ └─rhel-home 253:3 0 2G 0 lvm /home
├─sda3 8:3 0 1G 0 part /boot/efi
├─sda4 8:4 0 1K 0 part
├─sda5 8:5 0 55G 0 part /xyz
├─sda6 8:6 0 7G 0 part /tmp
├─sda7 8:7 0 7G 0 part /var/log
├─sda8 8:8 0 7G 0 part /var/log/audit
└─sda9 8:9 0 7G 0 part /var/tmp
sr0 11:0 1 1024M 0 rom