Quick: mdadm check RAID
August 9th, 2011
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Как да накараме mdadm да ни информира ако имаме проблем с някой от RAID масивите?
Елементарно:
mdadm --monitor --scan --mail=MAIL@DOMAIN.com --delay=3600 --daemonize --test
Archive
Archive for the ‘Всичко друго’ Category
Как да видим опашката от мейли на Qmail?
July 18th, 2011
2 comments
Елементарно 
/var/qmail/bin/qmail-qstat
Пример за това колко мейла има в опашката:
[12:04:03] blagomir@butterfly [~] #: /var/qmail/bin/qmail-qstat messages in queue: 44 messages in queue but not yet preprocessed: 0
Пример, с който да покажем до къде изпращаме мейли:
[13:30:06] blagomir@butterfly [~] #: /var/qmail/bin/qmail-qread 16 Jul 2011 10:30:29 GMT #4199501 640 <info@domain.bg> remote MAILBOX@DOMAIN.org 18 Jul 2011 08:17:14 GMT #4530632 643 <info@domain.bg> remote MAILBOX@DOMAIN.org
Categories: Cent OS, Debian, Linux, Всичко друго
QR код за адреса на нашия блог :)
May 20th, 2011
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За тези, които не знаят какво е QR code могат да погледнат тук (wiki)
Categories: Всичко друго
May 17th, 2011
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Cisco change ssh default port
How to change cisco default port :
g1r5_router(config)#ip ssh port 2000 rotary 1 g1r5_router(config)#line vty 0 4 g1r5_router(config-line)#rotary 1 g1r5_router(config-line)#end g1r5_router#copy running-config startup-config Destination filename [startup-config]? Building configuration... [OK]
Now lets try it:
[13:16]vhristev@g1r5:~$uname -a Darwin g1r5 10.2.0 Darwin Kernel Version 10.2.0: Tue Nov 3 10:37:10 PST 2009; root:xnu-1486.2.11~1/RELEASE_I386 i386 i386 [13:16]vhristev@g1r5:~$ssh 192.168.0.1 -p 2000 vhristev@192.168.0.1's password: g1r5_router>en Password: g1r5_router#sh ver Cisco IOS Software, 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(13b), RELEASE SOFTWARE (fc3)
Categories: Всичко друго
Cisco lab
April 7th, 2011
2 comments
This is one of my labs when I deal with networking.
Categories: Всичко друго
Gentoo software RAID
March 29th, 2011
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Gentoo Software RAID
Software RAID massives
You can check your RAID/LVM support with this command
cat /boot/config-`uname -r` | egrep 'RAID|LVM' CONFIG_RAID_ATTRS=m CONFIG_BLK_DEV_3W_XXXX_RAID=m CONFIG_SCSI_AACRAID=m CONFIG_MEGARAID_NEWGEN=y CONFIG_MEGARAID_MM=m CONFIG_MEGARAID_MAILBOX=m CONFIG_MEGARAID_LEGACY=m CONFIG_MEGARAID_SAS=m CONFIG_MD_RAID0=m CONFIG_MD_RAID1=m CONFIG_MD_RAID10=m CONFIG_MD_RAID456=m
Kernel Config
Device Drivers Multi-device support (RAID and LVM) Multiple devices driver support (RAID and LVM) (MD [=y]) RAID support (BLK_DEV_MD [=y])
Load modules:
modprobe raid0 modprobe raid1 modprobe raid10
Partitions with “cfdisk”
cfdisk (util-linux-ng 2.13.1.1) Disk Drive: /dev/sda Size: 80025280000 bytes, 80.0 GB Heads: 255 Sectors per Track: 63 Cylinders: 9729 Name Flags Part Type FS Type [Label] Size (MB) ----------------------------------------------------------------------------------------------------------------------------- sda1 Boot Primary Linux raid autodetect 115.16 sda2 Primary Linux swap / Solaris 4087.97 sda3 Primary Linux raid autodetect 75820.64
Put partiton table from /dev/sda to /dev/sdb /dev/sdc1 /dev/sdd1 (:
sfdisk -d /dev/sda | sfdisk /dev/sdb | sfdisk /dev/sdc | sfdisk /dev/sdd
Create MD devices
cd /dev MAKEDEV md
!!! Linux can’t boot from software RAID 10 we make new BOOT partition with RAID1
# Create Boot partition mdadm --create --verbose /dev/md0 --level=1 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
#Create Root partition
mdadm --create --verbose /dev/md1 --level=10 --raid-devices=4 /dev/sda3 /dev/sdb3 /dev/sdc3 /dev/sdd3
Watch our RAID creation
watch cat /proc/mdstat watch -n1 'cat /proc/mdstat'
Update the mdadm config file.
mdadm --detail --scan >> /etc/mdadm.conf
# GRUB CONFIG
grub> find /boot/grub/stage1 (hd0,0) (hd1,0) (hd2,0) (hd3,0) grub>
#Install to drive 1
grub> device (hd0) /dev/sda grub> root (hd0,0) grub> setup (hd0)
#Install to drive 2
grub> device (hd0) /dev/sdb grub> root (hd0,0) grub> setup (hd0)
#Install to drive 3
grub> device (hd0) /dev/sdc grub> root (hd0,0) grub> setup (hd0)
#Install to drive 4
grub> device (hd0) /dev/sdd
grub> root (hd0,0)
grub> setup (hd0)
Set grub menu.list
!!!!! change real_root=/dev/md???? whith your RAID ROOT configuration !!!!!!!!
echo -e "default 0\ntimeout 3\n\ntitle=Gentoo Linux (2.6.29-gentoo-r1-VHristev)\nroot (hd0,0)" > /boot/grub/grub.conf echo "kernel `ls /boot/kernel*` root=/dev/ram0 init=/linuxrc ramdisk=8192 real_root=/dev/md1 udev" >> /boot/grub/grub.conf echo "initrd `ls /boot/initramfs*`" >> /boot/grub/grub.conf grep --invert-match rootfs /proc/mounts > /etc/mtab
Categories: Всичко друго
Mac OS X create ISO from DVD/CD
March 29th, 2011
No comments
You have DVD with software and you want to install with Parallels/VMware Fusion/Virtual Box but … you don’t want to use your old scribbled disk and we need to convert it to .iso.
[18:31]vhristev@coco-12:~$drutil status Vendor Product Rev MATSHITA DVD-R UJ-868 KB19 Type: DVD-ROM Name: /dev/disk1 Sessions: 1 Tracks: 1 Overwritable: 00:00:00 blocks: 0 / 0.00MB / 0.00MiB Space Free: 00:00:00 blocks: 0 / 0.00MB / 0.00MiB Space Used: 348:05:15 blocks: 1566390 / 3.21GB / 2.99GiB Writability: Book Type: DVD-ROM (v1) [18:31]vhristev@coco-12:~$diskutil umountDisk /dev/disk1 Unmount of all volumes on disk1 was successful [18:31]vhristev@coco-12:~$dd if=/dev/disk1 of=Solaris_10.iso bs=2048
Categories: Всичко друго
Reinstalling the host management agents and HA agents on ESXi
March 28th, 2011
No comments
1. Right-click on the ESXi host and click Disconnect. This disconnects the ESXi host from the VirtualCenter Inventory.
2. Log in to ESXi Troubleshooting Mode. For more information, see Tech Support Mode for Emergency Support (1003677).
3. Uninstall the vpxa and aam components from the VMware ESXi host using the following commands:
/opt/vmware/uninstallers/VMware-vpxa-uninstall.sh
/opt/vmware/uninstallers/VMware-aam-ha-uninstall.sh
4. Right-click on the ESXi host and click Connect. This initiates a re-install of the vpxa agent.
5. Add the host to the appropriate cluster. This initiates a re-install of the aam agent.
If the agent fails to automatically install when connecting the ESX host in the vCenter Server:
1. Verify that /tmp/vmware-root exists on the ESX host. vCenter stages the vpxa RPM in this folder. To add this directory, execute:
mkdir -p /tmp/vmware-root
Categories: ESX, ESX 4.x, VMware, Всичко друго
Console torrent client (rtorrent)
March 23rd, 2011
1 comment
I really like my rtorrent it is really easy to use it.
Install rtorrent on Mac os x (you need installed ports to use this feature)
[21:05]vhristev@g1r5:~$port search rtorrent rtorrent @0.8.4 (net) console-based BitTorrent client rtorrent-devel @0.8.5 (net) console-based BitTorrent client (development version) Found 2 ports. [21:05]vhristev@g1r5:~$sudo port install rtorrent ---> Computing dependencies for rtorrent ---> Cleaning rtorrent [21:05]vhristev@g1r5:~$
How to start downloading torrent file.
My first advice is USE “screen” like me .I am in the office and want to start downloading something.
1.I run screen then i run my rtorrent and voala perfect console torrent client and i don’t have to worry about my connection between office and home (:
2. rtorrent TORRENT_FILE
Im lazy and download this pictures from internet (:
Basic keyboard shortcuts:
^q — closes rTorrent, done twice makes the program shutdown. Up, down arrows — highlight the downloads. Left arrow — returns to the previous screen. Right arrow — goes to the next screen. a|s|d — increase global upload speed about 1|5|50 KB/s A|S|D — increase global download speed about 1|5|50 KB/s z|x|c — decrease global upload speed about 1|5|50 KB/s Z|X|C — decrease global download speed about 1|5|50 KB/s ^S — starts download ^D — pauses and resumes the active download +|- — changes the download priority of selected torrent. Backspace — adds the specified .torrent. After pressing this button write full path or URL of .torrent file. You can use Tab and other tricks from bash.
Categories: Всичко друго