Redhat
Redhat Linux默认的文件系统是什么格式？
Linux默认的文件系统是什么格式？
现在Redhat Linux默认的文件系统格式是ext4。可以通过如下多种方法查询文件系统类型
1. mount
:~$ mount
/dev/sda1 on / type ext4 (rw,errorsremount-ro,user_xattr)
proc on /proc type proc (rw,noexec,nosuid,nodev)
none on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
none on /dev type devtmpfs (rw,mode0755)
none on /dev/pts type devpts (rw,noexec,nosuid,gid5,mode0620)
none on /dev/shm type tmpfs (rw,nosuid,nodev)
none on /var/run type tmpfs (rw,nosuid,mode0755)
none on /var/lock type tmpfs (rw,noexec,nosuid,nodev)
none on /lib/init/rw type tmpfs (rw,nosuid,mode0755)
none on /var/lib/ureadahead/debugfs type debugfs (rw,relatime)
none on /proc/fs/vmblock/mountPoint type vmblock (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
gvfs-fuse-daemon on /home/kysnail/.gvfs type fuse.gvfs-fuse-daemon
(rw,nosuid,nodev,userkysnail)
:~$
2. df
:~$ df -lhT
文件系统 类型 容量 已用 可用 已用% 挂载点
/dev/sda1 ext4 19G 11G 7.8G 57% /
none devtmpfs 498M 248K 497M 1% /dev
none tmpfs 502M 252K 501M 1% /dev/shm
none tmpfs 502M 96K 502M 1% /var/run
none tmpfs 502M 0 502M 0% /var/lock
none tmpfs 502M 0 502M 0% /lib/init/rw
none debugfs 19G 11G 7.8G 57% /var/lib/ureadahead/debugfs
:~$
3. fdisk
:~$ sudo fdisk /dev/sda
WARNING: DOS-compatible mode is deprecated. Its strongly recommended to
switch off the mode (command c) and change display units to
sectors (command u).
Command (m for help): c
DOS Compatibility flag is not set
Command (m for help): u
Changing display/entry units to sectors
Command (m for help): p
Disk /dev/sda: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 cylinders, total 41943040 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
Disk identifier: 0x00077544
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 40105983 20051968 83 Linux
/dev/sda2 40108030 41940991 916481 5 Extended
/dev/sda5 40108032 41940991 916480 82 Linux swap / Solaris
Command (m for help): q
4. file
:~$ sudo file -s /dev/sda
/dev/sda: x86 boot sector partition 1: ID0x83, active, starthead 32, startsector 2048,
40103936 sectors partition 2: ID0x5, starthead 254, startsector 40108030, 1832962 sectors,
code offset 0x63
:~$ sudo file -s /dev/sda1
/dev/sda1: Linux rev 1.0 ext4 filesystem data, UUID4942da40-8a49-4bfd-9dc2-45c906d48413 (needs
journal recovery) (extents) (large files) (huge files)
:~$
5. parted
:~$ sudo parted
GNU Parted 2.2
使用 /dev/sda
欢迎使用 GNU Parted! 输入 help可获得命令列表.
(parted) p
Model: VMware, VMware Virtual S (scsi)
磁盘 /dev/sda: 21.5GB
Sector size (logical/physical): 512B/512B
分区表：msdos
数字 开始： End 大小 类型 文件系统 标志
1 1049kB 20.5GB 20.5GB primary ext4 启动
2 20.5GB 21.5GB 938MB extended
5 20.5GB 21.5GB 938MB logical linux-swap(v1)
(parted)
6. 查看 fstab
# /etc/fstab: static file system information.
#
# Use blkid -o value -s UUID to print the universally unique identifier
# for a device this may be used with UUID as a more robust way to name
# devices that works even if disks are added and removed. See fstab(5).
#
#
proc /proc proc nodev,noexec,nosuid 0 0
# / was on /dev/sda1 during installation
UUID4942da40-8a49-4bfd-9dc2-45c906d48413 / ext4 errorsremount-ro,user_xattr
0 1
# swap was on /dev/sda5 during installation
UUID935fb95d-771f-448e-9d23-4820106e1783 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
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