Lsblk কতগুলো
হার্ডডিস্ক বা মিডিয়া ডিভাইস লাগানো আছে তা দেখার জন্য।
Df –h পার্টিশন দেখার জন্য
hdparm -tt /dev/sda1 -for check hard disk performance speed
badblocks -s -for show hdd bddside information
cfdisk -for manage partition (create delete execute)
hdparm -tt /dev/sda1 -for check hard disk performance speed
badblocks -s -for show hdd bddside information
cfdisk -for manage partition (create delete execute)
Fdisk /dev/sda {ec another hdd sdb}
N
No need to change just enter
+ 20GiB
W
OK
Partprobe /dev/sda for use partition table without restart
Now have to format partition-
Mkfs.ext4 /dev/sda4 [we can use any partition type in instead of
ext4]
Mkdir /tarzen [we can use any
name]
Df –h
Mount /dev/sda4 /tarzan/
Df –h
We mount file till now as
temporary we need to mount permanent. If we only want permanently mount we
don’t need mount before only have to edit fstab file
Vi /etc/fstab
Another terminal [ blkid] for uuid
:x
Mount file problem check command
Mount –a
We successfully create partition
For delete partion
Umount /dev/sda4
Or
Umount /tarzen/
Fdisk /dev/sda
D
P
W
Partprobe /dev/sda
Vi /etc/fstab
Have to put a # sign before this
line which we enter before
:x
Mount –a
End Primary Partition
Extended
Partition:
Fdisk /dev/sda
P
N
1st sector as it is as mentioned in system
Last sector +5G [as we want]
[We can’t use extended partition directly we have to create logical
partition]
N
1st sector as it is
Last sector 1G
P
Partprobe /dev/sda
Mkfs.ext4 /dev/sad5
Mount /dev/sda5 /tarzen/
Df –h [show the tarzen size]
:w
Mount –a
End Extended Partition
Raid in Linux:
RAID-1
Fdisk –l
Fdisk
/dev/sdb
n
p
w
Fdisk
/dev/sdc
n
p
w
Fdisk
/dev/sdb
t
fd
w
Fdisk
/dev/sdc
t
fd
w
yum install
mdadm* -y
mdadm –E
/dev/sd[b-c]
mdadm --create
/dev/md0 --level=mirror --raid-devices=2 /dev/sd[b-c]1
y
cat
/proc/mdstat
mdadm
–detail /dev/md0
mkfs.ext4
/dev/md0
mkdir
/ironman
mount
/dev/md0 /ironman/
df –h
cd
/ironman/
ll
touch file
mkdir hello
ls
mdadm --detail
–scan –verbose >> /etc/mdadm.conf
mdadm --detail
/dev/md0
mdadm
--manage /dev/md0 --fail /dev/sdc1
mdadm
–detail /dev/md0
mdadm
--manage /dev/md0 --remove /dev/sdc1
mdadm
–detail /dev/md0
Raid-5:
fdisk –l
mdadm –c
/dev/md0 - -level=raid5 - -raid-devices=3 /dev/sdb1 /dev/sdc1 /dev/sdd1
y
mkfs.ext4 /dev/md0
mount
/dev/md0 /ironman/
df –h
mdadm -
-detail /dev/md0
mdadm -
-detail –scan - -verbose >> /etc/mdadm.conf
Hard Disk
Portions In Linux:
Lsblkকতগুলোহার্ডডিস্কবামিডিয়াডিভাইসলাগানোআছেতাদেখারজন্য।
Df –h পার্টিশনদেখারজন্য
Fdisk /dev/sda {ec another hddsdb}
N
P
No need to change just enter
+ 20GiB
W
OK
Partprobe /dev/sda for use partition table without restart
Now have to format partition-
Mkfs.ext4 /dev/sda4 [we can use any partition type in instead of
ext4]
Mkdir /tarzen [we can use any
name]
Df –h
Mount /dev/sda4 /tarzan/
Mount –t ext4 /dev/sda4 /tarzan/
[if we want to specific file system mount]
Df–h
We mount file till now as
temporary we need to mount permanent. If we only want permanently mount we
don’t need mount before only have to edit fstab file
Vi /etc/fstab
:x
Mount file problem check command
Mount –a
We successfully create partition
For delete partion
Umount /dev/sda4
Or
Umount /tarzen/
Fdisk /dev/sda
D
P
W
Partprobe /dev/sda
Vi /etc/fstab
Have to put a # sign before this
line which we enter before
:x
Mount –a
End Primary Partition
Extended
Partition:
Fdisk /dev/sda
P
N
1st sector as it is as mentioned in system
Last sector +5G [as we want]
[We can’t use extended partition directly we have to create logical
partition]
N
1st sector as it is
Last sector 1G
P
Partprobe /dev/sda
Mkfs.ext4 /dev/sad5
Mount /dev/sda5 /tarzen/
Df –h [show the tarzen size]
Vi /etc/fstab
:w
Mount –a
End Extended Partition
LVM
Partition:
Logical volume Manager – we can
extend reduce partition size in LVM other type can’t. we have create first
physical volume then create logical volume. root boot swap not applicable.
fdisk /dev/sda
n
e
1
[whice partion want to create
extended]
first
sector
last sector
l
partprobe
/dev/sda
t [have to change
partition linux lvm]
5 [select drive
no]
8e
w
pvcreate
/dev/sdb5 /dev/sdb6 /dev/sdb7 [for create physical volume]
pvdisplay
or
pvs
vgcreate vg1 /dev/sda5 /dev/sda6 [for create volume group]
vgdisplay or vgs
lvcreate –l +5g –n lv1 vg1
lvdisplay or lvs
mkfs.ext4 /dev/vg1/lv1
mkdir /lv_dir
mount /dev/vg1/lv1 /lv_dir/
from physical disk
pvcraete /dev/sda
pvcraete /dev/sdb
pvcraete /dev/sdc
pvscan –v
vgcreate vg1 /dev/sdb
vgextend vg1 /dev/sdc /dev/sdd [use for extend or add new hdd]
pvscan –v
lvcreate –L 10G –n lv_1 vg1
lvextend –L +5G /dev/vg1/lv_1
[for extend logical volume partition size]
resize2fs /dev/vg1/lv_1
For reduce logcal volume size:
umount /spiderman/
e2fsck –f /dev/vg1/lv_1 [like defragment]
resize2fs /dev/vg1/lv_1 200M [after
reduce size our volume will be 200M]
lvreduce –L 200M /dev/vg1/lv_1
mount /dev/vg1/lv_1 /spiderman/
fsck - for check file error
umount /dev/sda - frist need unmount file
fsck /dev/sda
show number code-
1 file system error corrected
2 system should be rebooted
4 file system error left uncorrected
8 operational error
16 usage or syntax error
32 fsck cancelled by user
128 shared library error
fsck - for check file error
umount /dev/sda - frist need unmount file
fsck /dev/sda
show number code-
1 file system error corrected
2 system should be rebooted
4 file system error left uncorrected
8 operational error
16 usage or syntax error
32 fsck cancelled by user
128 shared library error
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