df(Disk Filesystem) Provides Disk space usage of our File System.
df is a command line utility mostly used for checking disk space utilization in Linux.
Now Let us see what happen when we type df on terminal of a linux machine.
(1)The mount points of File Systems
(2)Percentage of Memory Usage
1.How will you display the information of your all file systems.
3.How to see the information of your /home, /tmp or any file system you want?
10. Now how to exclude some certain file system trype?
df is a command line utility mostly used for checking disk space utilization in Linux.
Now Let us see what happen when we type df on terminal of a linux machine.
[root@noel ~]# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 50300564 19336500 28367564 41% /
tmpfs 513384 0 513384 0% /dev/shm
so the most important information we got from above command is (1)The mount points of File Systems
(2)Percentage of Memory Usage
1.How will you display the information of your all file systems.
[root@noel ~]# df -a
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 50300564 19337300 28366764 41% /
proc 0 0 0 - /proc
sysfs 0 0 0 - /sys
devpts 0 0 0 - /dev/pts
tmpfs 513384 0 513384 0% /dev/shm
none 0 0 0 - /proc/sys/fs/binfmt_misc
sunrpc 0 0 0 - /var/lib/nfs/rpc_pipefs
2.Now how will you show all above information in a human readable format.
[root@noel ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 48G 19G 28G 41% /
tmpfs 502M 0 502M 0% /dev/shm
You can clearly see the detail information of File system /dev/sda3 above in human readable format.3.How to see the information of your /home, /tmp or any file system you want?
[root@noel ~]# df -h /tmp
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 48G 19G 28G 41% /
or
[root@noel ~]# df -hT /tmp
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda3 ext3 48G 19G 28G 41% /
4.How to see the information of File System in Bytes?
[root@noel ~]# df -k
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 50300564 19337344 28366720 41% /
tmpfs 513384 0 513384 0% /dev/shm
5.How to see the Information of File System in MB?
[root@noel ~]# df -m
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/sda3 49122 18885 27702 41% /
tmpfs 502 0 502 0% /dev/shm
6.How to see the information of FileSystem in GB?
[root@noel ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 48G 19G 28G 41% /
tmpfs 502M 0 502M 0% /dev/shm
or
[root@noel ~]# df -H
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 52G 20G 30G 41% /
tmpfs 526M 0 526M 0% /dev/shm
7.How to see the File System Type?
[root@noel ~]# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda3 ext3 50300564 19337488 28366576 41% /
tmpfs tmpfs 513384 0 513384 0% /dev/shm
8.How to see the File System Inodes?
[root@noel ~]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda3 13008896 248554 12760342 2% /
tmpfs 128346 1 128345 1% /dev/shm
Now i am going to include windows File systems too by mounting it. And for that first i have created a directory /win7[root@noel ~]# mkdir /win7 [root@noel ~]# fdisk -l Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytesDevice Boot Start End Blocks Id System /dev/sda1 * 1 13 102400 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 13 6502 52121600 7 HPFS/NTFS /dev/sda3 6503 12967 51930112+ 83 Linux /dev/sda4 12968 19457 52130925 5 Extended /dev/sda5 16829 17089 2096451 82 Linux swap / Solaris /dev/sda6 17090 19457 19019776 b W95 FAT32 /dev/sda7 12968 16663 29688057 83 Linux /dev/sda8 16664 16828 1325331 82 Linux swap / SolarisPartition table entries are not in disk order[root@noel ~]# mount /dev/sda2 /win7/ [root@noel ~]# mount /dev/sda2 /win7/
[root@noel ~]# df -T
Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda3 ext3 50300564 19337676 28366388 41% /
tmpfs tmpfs 513384 0 513384 0% /dev/shm
/dev/sda2 fuseblk 52121596 45282364 6839232 87% /win7
[root@noel ~]# df -Th
Filesystem Type Size Used Avail Use% Mounted on
/dev/sda3 ext3 48G 19G 28G 41% /
tmpfs tmpfs 502M 0 502M 0% /dev/shm
/dev/sda2 fuseblk 50G 44G 6.6G 87% /win7
[root@noel ~]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda3 13008896 248575 12760321 2% /
tmpfs 128346 1 128345 1% /dev/shm
/dev/sda2 7035840 145925 6889915 3% /win7
9.Now how to include only certain file system type?
[root@noel ~]# df -t fuseblk
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda2 52121596 45282364 6839232 87% /win7
[root@satish ~]# df -t ext3
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 50300564 19337748 28366316 41% /
in first command i have
included only fuseblk that's why we have not seen /dev/sda3 i.e ext3
file type their. while in second command i have included only ext3.10. Now how to exclude some certain file system trype?
[root@noel ~]# df -x fuseblk
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda3 50300564 19337796 28366268 41% /
tmpfs 513384 0 513384 0% /dev/shm
11.How to change the Block Size?
[root@noel ~]# df --block-size=2048
Filesystem 2K-blocks Used Available Use% Mounted on
/dev/sda3 25150282 9669332 14182700 41% /
tmpfs 256692 0 256692 0% /dev/shm
/dev/sda2 26060798 22641182 3419616 87% /win7
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