How to pxe boot cent os 7



  • Ive been trying for 2 days to make a working boot code for centos 7 and I cannot get it to work.

    I run fog rc3 on Ubuntu 16.04.1

    ive received this code from Here and needless to say no go.

    :Centos
    kernel http://${fog-ip}/fog/service/ipxe/Centos/images/pxeboot/vmlinuz
    initrd http://${fog-ip}/fog/service/ipxe/Centos/images/pxeboot/initrd.img
    imgargs vmlinuz root=/dev/nfs boot=isolinux netboot=nfs nfsroot=${fog-ip}:/var/www/fog/service/ipxe/Centos/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start

    :Centos
    set path /fog/service/ipxe/Centos
    set nfs_path /images/service/ipxe/Centos
    kernel http://${fog-ip}/fog/service/ipxe/Centos/images/pxeboot/vmlinuz ks=http://${fog-ip}/fog/kickstarts/centos6.cfg ramdisk_size=100000 ksdevice=eth0 root=/dev/rd/0 ip=dhcp splash quiet – || read void
    initrd http://${fog-ip}/fog/service/ipxe/Centos/images/pxeboot/initrd.img || read void
    goto start

    the first one loads but then errors out. it states the dev/nfs is not right, the 2nd code just stops in the begin without going anywhere.
    any ideas??



  • @Wayne-Workman Here is an updated working centos boot code that works for using your own downloaded repo as well as the online repo.

    I downloaded my own repo using command <wget -r -l 0 ./LOCAL-DIR WEBSITE-URL> in Ubuntu.
    once downloaded
    I then copied the repo from my home directory to the /bootimgs folder.
    I then modified the boot code originally provided by @george1421 from:
    :centos
    initrd http://${fog-ip}/bootimgs/centos/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/centos/images/pxeboot/vmlinuz initrd=initrd.img method=http://${fog-ip}/bootimgs/centos/ devfs=nomount ip=dhcp
    boot || goto MENU

    to

    initrd http://${fog-ip}/bootimgs/centos/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/centos/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimgs/centos/LiveOS/squashfs.img ip=dhcp repo=http://192.168.1.109/bootimgs/centosrepo/mirror.nodeshosting.com/centos/7.2.1511/os/x86_64 splash quiet – || read void
    boot || goto MENU

    the end result is that now I have my own home repo that works even if my machine is not connected to the internet. I assume this is good for corporate or environments where the admin is not wanting to use much data from or restrict the net.

    it also makes short work of the install time.

    I hope this makes someone’s life a bit more easier

    0_1473836274949_cent os boot complete.png



  • @dureal99d said in How to pxe boot cent os 7:

    initrd http://${fog-ip}/bootimgs/centos/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/centos/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimgs/centos/LiveOS/squashfs.img ip=dhcp rootflags=“loop” rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0 rd.md=0 rd.dm=0
    boot || goto MENU

    @Developers @Moderators @Senior-Developers I wanted to update this thread with my current progress. both are working bootable.

    in virtualbox i had to have at least 1650 gigs of ram allocated for it to boot. anything under that and it will error out. but i expect most machines these days to have at least 3 to 4 gigs of ram so any who choose to use should be fine.

    Hope this helps make someones life a bit easier.

    both are fully working
    live only fedora
    initrd http://${fog-ip}/bootimgs/fedora/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/fedora/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimgs/fedora/LiveOS/squashfs.img devfs=nomount ip=dhcp
    boot || goto MENU

    live and install fedora
    initrd http://${fog-ip}/bootimgs/fedora/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/fedora/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimgs/fedora/LiveOS/squashfs.img rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0 rd.md=0 rd.dm=0
    boot || goto MENU



  • @george1421 said in How to pxe boot cent os 7:

    fedora pxe boot guide.

    @george1421 I have moved from the files from the fog root and moved them to /opt/bootimgs/ then I created a soft link to them as suggested by @Wayne-Workman . So no more fog eating the files on every upgrade. thank you. I am going to start reading up on all these codes so I can have a better understanding for these situation.

    at any rate if you find you get the time a fedora code would be nice but not all that needed. oh and i almost forgot to post this.

    Working boot menu for all but “centos live” and “fedora”

    Hope this helps make someone’s life a bit easier now or later

    :MENU
    menu
    item --gap -- ---------------- iPXE boot menu ----------------
    item mac Macrium Reflect
    item clonezilla Clonezilla 2015
    item ubuntu6 Ubuntu 16:04.1 x64
    item ubuntu6 Ubuntu 16:04.1 x32
    item ubuntu Ubuntu 15:10 x64
    item ubuntu Ubuntu 15:10 x32
    item kubuntu6 Kubuntu 16:04.1 x64 
    item kubuntu6 Kubuntu 16:04.1 x32
    item kubuntu Kubuntu 15:10 x64 
    item kubuntu Kubuntu 15:10 x32
    item mint18 Linux Mint 18 "Sarah" - MATE (32-bit)
    item Mint18 Linux Mint 18 "Sarah" - MATE (64-bit)
    item mint Linux Mint 17.2 "Rafaela" - MATE (32-bit)
    item Mint Linux Mint 17.2 "Rafaela" - MATE (64-bit)
    item mint Linux Mint 17.2 "Rafaela" - Cinnamon (32-bit)
    item Mint Linux Mint 17.2 "Rafaela" - Cinnamon (64-bit)
    item BOOTCD Hirens 15.2 BOOTCD
    item pgon Paragon Harddisk Manager 12
    item ubd Ultimate Boot Disk
    item ez  EZ Gig IV Cloning Software
    item centos Centos
    item centos2 Centos Live
    item hostinfo details about this computer
    item shell ipxe shell
    item return return to previous menu
    choose --default return --timeout 5000 target && goto ${target}
    :mac
    initrd http://${fog-ip}/fog/service/ipxe/mac/mac.iso
    chain memdisk iso raw ||
    goto MENU
    
    :clonezilla
    kernel http://${fog-ip}/bootimgs/clonezilla/vmlinuz
    initrd http://${fog-ip}/bootimgs/clonezilla/initrd.img
    imgargs vmlinuz boot=live username=user fetch=http://${fog-ip}/bootimgs/clonezilla/filesystem.squashfs locale=en_US.UTF-8 keyboard-layouts=NONE
    boot || echo failed to boot
    prompt
    goto MENU```
    
    :ubuntu6
    kernel http://${fog-ip}/bootimgs/16.04.1_64/casper/vmlinuz.efi
    initrd http://${fog-ip}/bootimgs/16.04.1_64/casper/initrd.lz
    imgargs vmlinuz.efi root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/16.04.1_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :ubuntu6
    kernel http://${fog-ip}/bootimgs/16.04.1_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/16.04.1_32/casper/initrd.lz
    imgargs vmlinuz.efi root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/16.04.1_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :ubuntu
    kernel http://${fog-ip}/bootimgs/15.10_64/casper/vmlinuz.efi
    initrd http://${fog-ip}/bootimgs/15.10_64/casper/initrd.lz
    imgargs vmlinuz.efi root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/15.10_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :ubuntu
    kernel http://${fog-ip}/bootimgs/15.10_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/15.10_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/15.10_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :kubuntu6
    kernel http://${fog-ip}/bootimgs/kubuntu6_64/casper/vmlinuz.efi
    initrd http://${fog-ip}/bootimgs/kubuntu6_64/casper/initrd.lz
    imgargs vmlinuz.efi root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/kubuntu6_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :kubuntu6
    kernel http://${fog-ip}/bootimgs/kubuntu6_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/kubuntu6_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/kubuntu6_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    
    :kubuntu
    kernel http://${fog-ip}/bootimgs/kubuntu5_64/casper/vmlinuz.efi
    initrd http://${fog-ip}/bootimgs/kubuntu5_64/casper/initrd.lz
    imgargs vmlinuz.efi root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/kubuntu5_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :kubuntu
    kernel http://${fog-ip}/bootimgs/kubuntu5_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/kubuntu5_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/kubuntu5_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :mint18
    kernel http://${fog-ip}/bootimgs/lm18_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/lm18_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lm18_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :Mint18
    kernel http://${fog-ip}/bootimgs/lm18_64/casper/vmlinuz.efi
    initrd http://${fog-ip}/bootimgs/lm18_64/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lm18_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :mint
    kernel http://${fog-ip}/bootimgs/lm_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/lm_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lm_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :Mint
    kernel http://${fog-ip}/bootimgs/lm_64/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/lm_64/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lm_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :mint
    kernel http://${fog-ip}/bootimgs/lmc_32/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/lmc_32/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lmc_32/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :Mint
    kernel http://${fog-ip}/bootimgs/lmc_64/casper/vmlinuz
    initrd http://${fog-ip}/bootimgs/lmc_64/casper/initrd.lz
    imgargs vmlinuz root=/dev/nfs boot=casper netboot=nfs nfsroot=${fog-ip}:/var/www/html/bootimgs/lmc_64/ locale=en_US.UTF-8 keyboard-configuration/layoutcode=la mirror/country=US
    boot || goto failed
    goto start
    
    :centos
    initrd http://${fog-ip}/bootimgs/centos/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/centos/images/pxeboot/vmlinuz initrd=initrd.img method=http://${fog-ip}/bootimgs/centos/ devfs=nomount ip=dhcp
    boot || goto MENU
    
    :centos2
    initrd http://${fog-ip}/bootimgs/centos/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimgs/centos/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimgs/centos/LiveOS/squashfs.img ip=dhcp rootflags="loop" rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0 rd.md=0 rd.dm=0 
    boot || goto MENU
    
    :BOOTCD
    initrd http://${fog-ip}/bootimgs/bootcd/hirensboot.iso ||
    chain memdisk iso raw ||
    boot ||
    goto MENU
    
    :pgon
    initrd http://${fog-ip}/bootimgs/pgon/phdman12.iso ||
    chain memdisk iso raw ||
    boot ||
    goto MENU
    
    :ubd
    initrd http://${fog-ip}/bootimgs/ubcd/ubcd535.iso ||
    chain memdisk iso raw ||
    boot ||
    goto MENU
    
    :ez
    initrd http://${fog-ip}/bootimgs/ez/EZGIG438.iso ||
    chain memdisk iso raw ||
    boot ||
    goto MENU
    
    :hostinfo
    echo This computer : ||
    echo MAC address....${net0/mac} ||
    echo IP address.....${ip} ||
    echo Netmask........${netmask} ||
    echo Serial.........${serial} ||
    echo Asset number...${asset} ||
    echo Manufacturer...${manufacturer} ||
    echo Product........${product} ||
    echo BIOS platform..${platform} ||
    echo ||
    echo press any key to return to Menu ||
    prompt
    goto MENU
    
    :shell
    shell ||
    goto MENU
    :return
    chain http://${fog-ip}/${fog-webroot}/bootimgs/boot.php?mac=${net0/mac} ||
    prompt
    goto MENU
    Autoboot
    

  • Moderator

    @dureal99d The live boot bits that didn’t work for centos was from a fedora pxe boot guide. That is all I did and then just translated what was needed for the structure that fog uses. You will get much faster boot speed with http over ftp, or tftp that is why I kept everything in the same protocol by specifying http:// when making an object reference.

    Also from my instructcions I moved the files out of the fog directory where they will get clobbered when you update FOG. By putting them on the web server in a different root folder (i.e. not /fog) the fog installer scripts will not touch them. It would be very depressing if you created this monster boot menu and then have a fog upgrade eat all of your hard work.



  • @george1421 said in How to pxe boot cent os 7:

    OK lets step back and regroup here. Lets do the following

    1. Insert the Centos 7 dvd into your FOG server’s cdrom drive
    2. Key in the following commands into your fog server’s console as root:
    # we are going to put all of our boot images into the web server and issue the files
    # with apache and cut out all of this NFS crud
    mkdir /var/www/html/bootimg
    
    # connect to the centos dvd to the /mnt directory
    mount -o loop /dev/cdrom  /mnt
    
    #show me there is content there
    ls /mnt
    
    # Create a destination directory for the centos installer files
    mkdir /var/www/html/bootimg/centos7x64
    
    # Copy the content of the dvd to the proper location
    cp -r /mnt/*  /var/www/html/bootimg/centos7x64
    
    # Change the access level for world read
    chmod -R 755 /var/www/html/bootimg/centos7x64
    
    # Unmount the dvd drive since we already have the files
    umount /mnt
    
    1. Now in the FOG Configuration->iPXE New Menu Entry enter the following:
      Menu Item: Centos7PXEInst
      Description: Install Centos x64
      Parameters:
      initrd http://${fog-ip}/bootimg/centos7x64/images/pxeboot/initrd.img
      chain http://${fog-ip}/bootimg/centos7x64/images/pxeboot/vmlinuz initrd=initrd.img method=http://${fog-ip}/bootimg/centos7x64/ devfs=nomount ip=dhcp
      boot || goto MENU
      Menu Show with: All Hosts
    2. Now pxe boot your target computer and select the Install Centos x64 menu item.
    3. You should see the installer boot and run.

    This process can be replicated to other linux distributions. I just tested this, this morning on my dev fog server running 1.3.0-rc8 and it works.

    As for a live boot, these settings don’t work, the installer still runs. I don’t have time right now to figure out why the live boot bits are not working.

    Live OS boot

    initrd http://${fog-ip}/bootimg/centos7x64/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimg/centos7x64/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimg/centos7x64/LiveOS/squashfs.img ip=dhcp rootflags="loop" rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0 rd.md=0 rd.dm=0 
    boot || goto MENU
    

    @george1421 This worked like a charm. Cent os boots, I have to do the net install type but it boots and is able to be installed.

    Thank you all.

    Side note, this should work for fedora? yet fedora is refusing to boot. I think because fedora does that live boot thingy. gices this error >>dracut: FATAL: No or empty root=argument dracut: Refusing to continue. yet this thread is solved.



  • @Sebastian-Roth said in How to pxe boot cent os 7:

    /opt/bootimgs/16.04.1_64 *(rw,sync,no_wdelay,insecure_locks,no_root_squash,insecure)

    it works now, I see I had this line “nfsroot=${fog-ip}:/var/www/html/bootimgs/16.04.1_64/” wrong.

    I had nfsroot=${fog-ip}:/bootimgs/16.04.1_64/ which did not work but once I seen the path @george1421 was using I realized I had nfsroot= wrong.

    thank you all @Developers . all I have to do now is try the cent os method made by @george1421. I’m on that now



  • @george1421 ok I will try it shortly



  • @Sebastian-Roth ok, I’m trying it now


  • Moderator

    OK lets step back and regroup here. Lets do the following

    1. Insert the Centos 7 dvd into your FOG server’s cdrom drive
    2. Key in the following commands into your fog server’s console as root:
    # we are going to put all of our boot images into the web server and issue the files
    # with apache and cut out all of this NFS crud
    mkdir /var/www/html/bootimg
    
    # connect to the centos dvd to the /mnt directory
    mount -o loop /dev/cdrom  /mnt
    
    #show me there is content there
    ls /mnt
    
    # Create a destination directory for the centos installer files
    mkdir /var/www/html/bootimg/centos7x64
    
    # Copy the content of the dvd to the proper location
    cp -r /mnt/*  /var/www/html/bootimg/centos7x64
    
    # Change the access level for world read
    chmod -R 755 /var/www/html/bootimg/centos7x64
    
    # Unmount the dvd drive since we already have the files
    umount /mnt
    
    1. Now in the FOG Configuration->iPXE New Menu Entry enter the following:
      Menu Item: Centos7PXEInst
      Description: Install Centos x64
      Parameters:
      initrd http://${fog-ip}/bootimg/centos7x64/images/pxeboot/initrd.img
      chain http://${fog-ip}/bootimg/centos7x64/images/pxeboot/vmlinuz initrd=initrd.img method=http://${fog-ip}/bootimg/centos7x64/ devfs=nomount ip=dhcp
      boot || goto MENU
      Menu Show with: All Hosts
    2. Now pxe boot your target computer and select the Install Centos x64 menu item.
    3. You should see the installer boot and run.

    This process can be replicated to other linux distributions. I just tested this, this morning on my dev fog server running 1.3.0-rc8 and it works.

    As for a live boot, these settings don’t work, the installer still runs. I don’t have time right now to figure out why the live boot bits are not working.

    Live OS boot

    initrd http://${fog-ip}/bootimg/centos7x64/images/pxeboot/initrd.img
    chain http://${fog-ip}/bootimg/centos7x64/images/pxeboot/vmlinuz initrd=initrd.img root=live:http://${fog-ip}/bootimg/centos7x64/LiveOS/squashfs.img ip=dhcp rootflags="loop" rootfstype=auto ro rd.live.image quiet rhgb rd.luks=0 rd.md=0 rd.dm=0 
    boot || goto MENU
    

  • Developer

    @dureal99d Now that you have clead up your exports file it seems like you need to add those again. Please change your last entry to /opt/bootimgs/16.04.1_64 *(rw,sync,no_wdelay,insecure_locks,no_root_squash,insecure) and see if it boots up.



  • @Sebastian-Roth I can care less about being able to write to it, i just want the permissions to be granted when linux distros try to mount and yess ill post the pic.

    0_1473239013290_pxe permission denied.png


  • Developer

    @dureal99d If you want to make it writeable you need to say so in the NFS exports file:

    /images *(ro,sync,no_wdelay,no_subtree_check,insecure_locks,no_root_squash,insecure,fsid=0)
    /images/dev *(rw,async,no_wdelay,no_subtree_check,no_root_squash,insecure,fsid=1)
    /var/www/fog/service/ipxe *(ro,sync,no_wdelay,insecure_locks,no_root_squash,insecure)
    /opt/bootimgs *(rw,sync,no_wdelay,insecure_locks,no_root_squash,insecure)
    

    See I put rw where it said ro in the config you posted last.

    Can you please post a picture of the permissions error you see on boot?



  • @Tom-Elliott I have successfully mounted the nfs on my remote machine. on my other linux machine i did not have the nfs system installed once i did wala it mounted. however i cant write to it its read only. and when i boot the linux ditro it all goes good utill its time to mount the nfs then i get a permissions denied error



  • @Wayne-Workman said in How to pxe boot cent os 7:

    @dureal99d The syntax is:

    ln -s <source> <destination>

    You should remove the left/right carrots when running the command.
    If all the ISOs are in /opt/bootimgs the command would be:
    ln -s /opt/bootimgs /var/www/html

    Of course, apache needs access to this new directory also. It’s fine to set ownership of /opt/bootimgs to apache:root or 777 or something.

    And your resultant web path to these files would then be:
    http://<IP>/bootimgs/whatever

    How would I give apache permissions to the new folder?

    I set the folder as chmod 777 and can now write into the folder on the local machine. but when I try to load any distro I now get the dreaded permissions denied on nfs mount. and the nfs is exported.



  • @Tom-Elliott yum doesn’t apply to me I’m on Ubuntu 16.04.1. it does offer for me to install it should I? @Tom-Elliott I have installed yum. and am executing the program you have told me too.


  • Senior Developer

    @Tom-Elliott also can you run yum -y install portmap nfs-utils nfs4-acl-tools


  • Senior Developer

    @dureal99d you could try readding the -t nfs



  • @Tom-Elliott Should i be trying to mount this share locally or on another machine?



  • @Tom-Elliott said in How to pxe boot cent os 7:

    dmesg | tail -20

    [ 8605.032191] nfsd: last server has exited, flushing export cache
    [ 8605.178847] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
    [ 8605.179097] NFSD: starting 90-second grace period (net ffffffff81ef3ec0)
    [177245.456195] nfsd: last server has exited, flushing export cache
    [177245.571541] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
    [177245.571572] NFSD: starting 90-second grace period (net ffffffff81ef3ec0)
    [504820.256179] nfsd: last server has exited, flushing export cache
    [504820.379183] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
    [504820.379211] NFSD: starting 90-second grace period (net ffffffff81ef3ec0)
    [505766.396169] nfsd: last server has exited, flushing export cache
    [505766.443252] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
    [505766.443281] NFSD: starting 90-second grace period (net ffffffff81ef3ec0)
    [512189.424200] nfsd: last server has exited, flushing export cache
    [512189.469462] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
    [512189.469507] NFSD: starting 90-second grace period (net ffffffff81ef3ec0)
    [512652.019883] FS-Cache: Loaded
    [512652.045276] FS-Cache: Netfs ‘nfs’ registered for caching
    [512652.087294] NFS: Registering the id_resolver key type
    [512652.087309] Key type id_resolver registered
    [512652.087310] Key type id_legacy registered


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