Linux Operating System has lots of different file system alternatives, with all the existing default is commonly used ext4. File systems are generally utilized in order for handling how the information is kept soon after any program no longer is utilizing it, how accessibility to the information is managed, what other information (metadata) is linked […]
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LVM(LOGICAL VOLUME MANAGER) LVM(LOGICAL VOLUME MANAGER) —————————————– 1>first create partion #partprobe -s #pvcreate /dev/sda? #pvcreate /dev/sda? #vgcreate vg0 /dev/sda? /dev/sda? #vgdisplay #pvdisplay #lvdisplay #lvcreate -n lvm0 -L 150M vg0 (where -n—->name, -L—>length) #lvdisplay #mkfs.ext3 /dev/vg0/lvm0 #mkdir /mnt/lvm1 #mount /dev/vg0/lvm0 /mnt/lvm0 #vim /etc/fstab /dev/vg0/lvm0 /mnt/lvm0 ext3 defaults 0 0 #mount -a ——————————————————————————– Steps To Extend The […] *************** Summary ======= A) START – BIOS (Basic Input Output System) = when BIOS load in RAM Called BOOT STARPPING – CMOS = Called this process KERNAL LANDING – MBR in Hard Disk – BOOTLOADER – KERNEL – INITRD IMAGE – Inittab = Upto this process called USER LANDING B) There are two tyeps of […] Just configured and tested PXE Network Installation . Its Amazing!! Please bear with my rough notes on this Topic : >> Mount your CENTOS DVD to /media . >>>yum -y install dhcp tftp-server syslinux vsftpd system-config-kickstart >>> Configure DHCP Server as below : #vi /etc/dhcpd.conf ddns-update-style interim; ignore client-updates; allow booting; allow bootp; authoritative; subnet […] SSH passwordless multiple login I’ve already written about howto log in, on your local system, and make passwordless ssh connections using ssh-keygen command. However, you cannot just follow these instructions over and over again, as you will overwrite the previous keys. It is also possible to upload multiple public keys to your remote server, allowing […] An LVM snapshot is an exact mirror copy of an LVM partition which has all the data from the LVM volume from the time the snapshot was created. The main advantage of LVM snapshots is that they can reduce the amount of time that your services / application are down during backups because a snapshot […] pam_tally2 command – lock & unlock ssh failed logins in linux pam_tally2 command is used to lock and unlock ssh failed logins in linux like operating system. To implment a security feature like a user’s account must be locked after a number of failed login attempts . We can achieve this security via pam module […] Hardware Serial Numbers Linux Command to Retrieve Ever needed to obtain the serial number (or other details) for a remote server? Couldn’t be bothered to walk/run/drive/fly all the way there just to read a sticky label on the back or bottom of said server? Read on then. The command you want to run, as root, […] RAID (Redundant Array of Inexpensive Disks) Create 3 partitions for implementing RAID using fdisk command. e.g. #fdisk /dev/hda Press n to create the 3 new partitions each of 100Mb in size. Press p to see the partition table. Press t to change the partition id of all the three partitions created by you to fd […] Kdump is an utility used to capture the system core dump in the event of system crashes. These captured core dumps can be used later to analyze the exact cause of the system failure and implement the necessary fix to prevent the crashes in future. Kdump reserves a small portion of the memory for the […] |
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