solaris some useful commands-1

    Explain the boot process?

    Boot process dived into 4 phases.

    1. POST

    2. OBPROM

    3. KERNEL INITIALIZATION

    4. INIT PHASES

    5.SVC statd

    POST: Power on self test, It will detect hardware, machine host ID,serial No, architecture type, memory and Ethernet address and it will load the primary program called bootblk.

    OBP: Open boot programmable,

                1.Diagnosing all the system hardware and memory.

                2.Initializing the boot parameter.

                3.Creating device trees and load the boot block from (0-15 sector), it is called as

                   secondary boot programmable ufsboot.

    KERNEL

    INITIALIZATION: ufsboot load the kernel (generic unix), kernel will load all the necessary

                             devices modules to mount the root partition to continue the booting process.

    Init Phase : It will started by executing of /etc/init program and start other process reading the

                       /etc/inittab files, as the directory in the /etc/inittab files.

    Svc startd : It will read the rcp data and start the services

    What is the difference between init 1 and init s ?

    If you switch from multiuser mode to init s and switch it back to multiuser mode.then remote useres automatically reconnects to the system.

    where as in the case of init 1. they have to reconnect manully means they have to relogin

    Explain about init phases

    There are 8 run level.

    Init0: Shutting down the system and bring back the system to OBP prompt (OK)

    Init1: Single user mode for administrative

    Init2: Multi user mode without resource sharing

    Init3: Multi user mode with resource sharing

    Init4: Not in use

    Init5: Shutdown and power off the system

    Init6: Reboot the system to default run level

    Inits: Single user mode but user login are disabled

    Explain rc script and run level

    Rc script : check and mount the file system, start and stop the various process.

    Run level: Base on the init phases 8 run level

    Which file will take place while booting.

    # /etc/inittab

    How many file to modify the host name to be changed without rebooting the system.

    There are 6 files.

    #vi /etc/hosts

    #vi /etc/nodename

    #vi /etc/hostname.hme

    #vi /etc/net/ticlts/hosts

    #vi /etc/net/ticosts/hosts

    #vi /etc/net/ticotsord/hosts

    Where the ip address will be stored

    # /etc/hosts

    # /etc/hosts.equi

    # /etc/hosts.hme

    How to configure the network card

    # ifconfig hme0 plumb

    # ifconfig hme0 192.9.200.10 netmask 255.255.255.0 up

    # vi /etc/hosts ( update the ip address )

    # vi /etc/hosts.hme0 ( update the ip address ) --> to bring the interface along with the ipaddress during boot time.

    How to configure the virtual ip address

    Infinity virtual ip address can be created.

    # ifconfig hme0:1 plumb

    # ifconfig hme0:1 192.9.200.10 netmask 255.255.255.0 up

    # vi /etc/hosts ( update the ip address )

    # vi /etc/hosts.hme0:1 ( update the ip address ) --> to bring the interface along with the ipaddress during boot time.

    How to find the network card speed

    # ndd –get /dev/hme link_speed          

    1 = 100mbps

    0 = 10mbps

    How to modify network card speed

    # ndd –set /dev/hme instance 0

    # ndd –get /dev/hme link_status

    # ndd –get /dev/hme link_mode

                 To modify

    # ndd –set /dev/eri instance 0

    # ndd –set /dev/eri adv_100T4_cap0

    # ndd –set /dev/eri adv_100fdx_cap1

    # ndd –set /dev/eri adv_100hdx_cap0

    # ndd –set /dev/eri adv_10fdx_cap0

    # ndd –set /dev/eri adv_10hdx_cap0

    # ndd –set /dev/eri adv_autoneg_cap0

    How to find the hardware configuration

    OK banner --> from the open boot prompt

    # prtconf

    # sysdef

    # /use/platform/sun4u/sbin/prtdiag

   How will you find the number of hard disk

    # format

    #dmesg  --> this will not give the correct answer

    #sysdef

    #iostat –En  --> it wont show the Fibre channel

    OK show-devs --> it will show the device scsi bus channel

    OK probe-scsi-all --> This will deteck all the scsi bus channel, it will show CD-ROM/DVD-ROM also

    Difference between probe-scsi-all and probe-scsi

    OK probe-scsi-all: it will show all the scsi devices connected internal and external

    OK probe-scsi: it will show only internal scsi devices connected

    How to create core dump and crash dump

    #coreadm

    Procedure for Firmware upgrade Shutdown root cron on csslu377 servers  #./etc/init.d/cron stop

    Reset the system controller from the console.# resetsc -y Upgrade the firmware on the system controller  > cd /114527-04 > lom -G ./sgrtos.flash> lom -G ./sgsc.flash Escape to lom> and reset the SC:  lom> resetsc -y Upgrade the firmware on the system boards:> lom -G ./lw8cpu.flash> lom -G ./lw8pci.flash Shutdown the Operating System. #shutdown –i0 –g0 –y

    This may take a while for the server to come up

    > poweroff> poweron

    Which file to be configuring the logs messages (like: /var/adm/message etc…)

    #/etc/syslog.conf

  Which file maintain the kernel

    # /etc/path_to_inst

  This will be quite complicative, because kernel is the core of the operating system, its an image of the OS. whereas /etc/path_to_inst are the drivers are stored for the enabled hardware.

    How will see the kernel version

    Ok banner --> This will not show the Kernel

    Ok .version  --> This will tell the open boot prompt version otherwords, FIRMWARE

    # prtconf –V

    # showrev --> will show the installed patches

    # uname –x