[root@localhost ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 devtmpfs 722M 0 722M 0% /dev tmpfs 739M 0 739M 0% /dev/shm tmpfs 739M 11M 728M 2% /run tmpfs 739M 0 739M 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 5.6G 12G 33% / /dev/sda1 1014M 172M 843M 17% /boot tmpfs 148M 36K 148M 1% /run/user/0 /dev/sr0 4.4G 4.4G 0 100% /run/media/root/CentOS 7 x86_64 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# ls /dev/ agpgart full network_latency sr0 tty23 tty42 tty61 vcs5 autofs fuse network_throughput stderr tty24 tty43 tty62 vcs6 block hidraw0 null stdin tty25 tty44 tty63 vcsa bsg hpet nvram stdout tty26 tty45 tty7 vcsa1 btrfs-control hugepages oldmem tty tty27 tty46 tty8 vcsa2 bus hwrng port tty0 tty28 tty47 tty9 vcsa3 cdrom initctl ppp tty1 tty29 tty48 ttyS0 vcsa4 centos input ptmx tty10 tty3 tty49 ttyS1 vcsa5 char kmsg pts tty11 tty30 tty5 ttyS2 vcsa6 console log random tty12 tty31 tty50 ttyS3 vfio core loop-control raw tty13 tty32 tty51 uhid vga_arbiter cpu lp0 rtc tty14 tty33 tty52 uinput vhci cpu_dma_latency lp1 rtc0 tty15 tty34 tty53 urandom vhost-net crash lp2 sda tty16 tty35 tty54 usbmon0 vmci disk lp3 sda1 tty17 tty36 tty55 usbmon1 vsock dm-0 mapper sda2 tty18 tty37 tty56 usbmon2 zero dm-1 mcelog sg0 tty19 tty38 tty57 vcs dmmidi mem sg1 tty2 tty39 tty58 vcs1 dri midi shm tty20 tty4 tty59 vcs2 fb0 mqueue snapshot tty21 tty40 tty6 vcs3 fd net snd tty22 tty41 tty60 vcs4 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# fdisk -l 磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000e1e5f 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM 磁盘 /dev/mapper/centos-root:18.2 GB, 18249416704 字节,35643392 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/mapper/centos-swap:2147 MB, 2147483648 字节,4194304 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 [root@localhost ~]# fdisk /dev/sda 欢迎使用 fdisk (util-linux 2.23.2)。 更改将停留在内存中,直到您决定将更改写入磁盘。 使用写入命令前请三思。 命令(输入 m 获取帮助):p 磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000e1e5f 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM 命令(输入 m 获取帮助):n Partition type: p primary (2 primary, 0 extended, 2 free) e extended Select (default p): p 分区号 (3,4,默认 3): 起始 扇区 (41943040-104857599,默认为 41943040): 将使用默认值 41943040 Last 扇区, +扇区 or +size{K,M,G} (41943040-104857599,默认为 104857599): 将使用默认值 104857599 分区 3 已设置为 Linux 类型,大小设为 30 GiB 命令(输入 m 获取帮助):p 磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000e1e5f 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM /dev/sda3 41943040 104857599 31457280 83 Linux 命令(输入 m 获取帮助):w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: 设备或资源忙. The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8) 正在同步磁盘。 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 devtmpfs 722M 0 722M 0% /dev tmpfs 739M 0 739M 0% /dev/shm tmpfs 739M 11M 728M 2% /run tmpfs 739M 0 739M 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 5.6G 12G 33% / /dev/sda1 1014M 172M 843M 17% /boot tmpfs 148M 40K 148M 1% /run/user/0 /dev/sr0 4.4G 4.4G 0 100% /run/media/root/CentOS 7 x86_64 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# fdisk -l 磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘标签类型:dos 磁盘标识符:0x000e1e5f 设备 Boot Start End Blocks Id System /dev/sda1 * 2048 2099199 1048576 83 Linux /dev/sda2 2099200 41943039 19921920 8e Linux LVM /dev/sda3 41943040 104857599 31457280 83 Linux 磁盘 /dev/mapper/centos-root:18.2 GB, 18249416704 字节,35643392 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 磁盘 /dev/mapper/centos-swap:2147 MB, 2147483648 字节,4194304 个扇区 Units = 扇区 of 1 * 512 = 512 bytes 扇区大小(逻辑/物理):512 字节 / 512 字节 I/O 大小(最小/最佳):512 字节 / 512 字节 [root@localhost ~]# [root@localhost ~]# reboot ────────────────────────────────────────────────────────────────────────────────────────────────────── Session stopped - Press <return> to exit tab - Press R to restart session - Press S to save terminal output to file Server unexpectedly closed network connection ┌────────────────────────────────────────────────────────────────────┐ │ ? MobaXterm 11.1 ? │ │ (SSH client, X-server and networking tools) │ │ │ │ ? SSH session to root@172.16.70.10 │ │ ? SSH compression : ? │ │ ? SSH-browser : ? │ │ ? X11-forwarding : ? (remote display is forwarded through SSH) │ │ ? DISPLAY : ? (automatically set on remote server) │ │ │ │ ? For more info, ctrl+click on help or visit our website │ └────────────────────────────────────────────────────────────────────┘ Last login: Thu Apr 8 11:23:28 2021 from 172.16.70.11 [root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size <19.00 GiB PE Size 4.00 MiB Total PE 4863 Alloc PE / Size 4863 / <19.00 GiB Free PE / Size 0 / 0 VG UUID Qs8BXE-eTLm-dZoH-Xc7L-XMR5-RErY-Q1di0s [root@localhost ~]# [root@localhost ~]# pvcreate /dev/sda3 Physical volume "/dev/sda3" successfully created. [root@localhost ~]# [root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size <19.00 GiB PE Size 4.00 MiB Total PE 4863 Alloc PE / Size 4863 / <19.00 GiB Free PE / Size 0 / 0 VG UUID Qs8BXE-eTLm-dZoH-Xc7L-XMR5-RErY-Q1di0s [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# vgextend No command with matching syntax recognised. Run ‘vgextend --help‘ for more information. Correct command syntax is: vgextend VG PV ... [root@localhost ~]# vgextend centos /dev/sda3 Volume group "centos" successfully extended [root@localhost ~]# [root@localhost ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 4 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 48.99 GiB PE Size 4.00 MiB Total PE 12542 Alloc PE / Size 4863 / <19.00 GiB Free PE / Size 7679 / <30.00 GiB VG UUID Qs8BXE-eTLm-dZoH-Xc7L-XMR5-RErY-Q1di0s [root@localhost ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 devtmpfs 722M 0 722M 0% /dev tmpfs 739M 0 739M 0% /dev/shm tmpfs 739M 11M 728M 2% /run tmpfs 739M 0 739M 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 5.6G 12G 33% / /dev/sda1 1014M 172M 843M 17% /boot tmpfs 148M 8.0K 148M 1% /run/user/42 tmpfs 148M 0 148M 0% /run/user/0 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# lvextend -L +30G /dev/mapper/centos-root Insufficient free space: 7680 extents needed, but only 7679 available [root@localhost ~]# lvextend -L +29G /dev/mapper/centos-root Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <46.00 GiB (11775 exten ts). Logical volume centos/root successfully resized. [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# pvdisplay --- Physical volume --- PV Name /dev/sda2 VG Name centos PV Size <19.00 GiB / not usable 3.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 4863 Free PE 0 Allocated PE 4863 PV UUID PVacQV-0nV5-yCy9-S0Se-LI3J-3BXs-o1fsxh --- Physical volume --- PV Name /dev/sda3 VG Name centos PV Size 30.00 GiB / not usable 4.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 7679 Free PE 255 Allocated PE 7424 PV UUID Epgvnz-pUry-DQXI-wlLR-Ncab-SfSv-URt9sZ [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 devtmpfs 722M 0 722M 0% /dev tmpfs 739M 0 739M 0% /dev/shm tmpfs 739M 11M 728M 2% /run tmpfs 739M 0 739M 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 5.6G 12G 33% / /dev/sda1 1014M 172M 843M 17% /boot tmpfs 148M 8.0K 148M 1% /run/user/42 tmpfs 148M 0 148M 0% /run/user/0 [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# [root@localhost ~]# resize2fs /dev/mapper/centos-root resize2fs 1.42.9 (28-Dec-2013) resize2fs: Bad magic number in super-block 当尝试打开 /dev/mapper/centos-root 时 找不到有效的文件系统超级块. [root@localhost ~]# xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-root isize=512 agcount=4, agsize=1113856 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0 spinodes=0 data = bsize=4096 blocks=4455424, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 data blocks changed from 4455424 to 12057600 [root@localhost ~]# [root@localhost ~]# df -h 文件系统 容量 已用 可用 已用% 挂载点 devtmpfs 722M 0 722M 0% /dev tmpfs 739M 0 739M 0% /dev/shm tmpfs 739M 11M 728M 2% /run tmpfs 739M 0 739M 0% /sys/fs/cgroup /dev/mapper/centos-root 46G 5.6G 41G 13% / /dev/sda1 1014M 172M 843M 17% /boot tmpfs 148M 8.0K 148M 1% /run/user/42 tmpfs 148M 0 148M 0% /run/user/0
原文:https://www.cnblogs.com/castielangel/p/14631528.html