Maintenance reference
Reference
| LAN IP addresses |
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| We want all IP address management to happen on the Buffalo DD-WRT router, as much as possible.
Ideally, static IPs will be served up to every known box based on MAC address. Then no matter what OS is booted, the machine will have the same name and IP address. The router is slick, it can do it, but be careful to Save AND Apply changes there. DHCP dynamic assignment IP range is 2...99, keep static IPs out of this range. every [/etc/hosts] should include this block: # ======================================================================================== # MDM My LAN names v10 192.168.21.1 tdm 192.168.21.200 buffalo # hardcoded Buffalo DD-WRT router IP # MDM Buffalo DHCP-provided static IPs assigned by MAC addresses # It's important to assign static IPs via router # It will always give the same IP regardless of OS # And it has the ability to provide the names via local DNS (I think!) # NOTE THAT 192.168.21.2-99 are RESERVED for dynamic IPs 192.168.21.132 wimpy # F4-6D-04-25-9C-60 192.168.21.133 wallee-wireless # macbook pro 00:26:bb:07:d3:7d 192.168.21.134 wallee # macbook pro 00:26:4a:18:ed:58 192.168.21.140 babe # andrea's ipad2 04:54:53:3A:7B:2A 192.168.21.179 dune # 00:1f:e2:07:2d:0e # TO BE ADDED UPDATED AND VERIFIED AS NEEDED # NOTE THAT 192.168.21.2-99 are RESERVED for dynamic IPs 192.168.21.4 darthfun # mike's iphone 00:26:B0:99:7F:7E 192.168.21.5 eetee # ipod touch 8gb 00:26:b0:59:4a:94 192.168.21.6 sweepea # girl's d-link card 00:1e:58:96:3a:2a 192.168.21.7 wiihii # wii 00:21:47:ba:c8:c2 192.168.21.8 iroku # roku wired 00:0d:4b:49:a6:30 192.168.21.9 irokit # roku wireless 00:0d:4b:49:a6:31 192.168.21.10 wynter # bailey's win7 laptop 00:11:F5:89:7B:00 192.168.21.11 hermione # andrea's dell inspiron 00:24:D6:78:42:A8 192.168.21.12 toothless # wren's eee 1C:4B:D6:A3:E1:28 192.168.21.13 dunno # 00:0f:b5:f6:99:d2 192.168.21.16 jackwhite # wren's iphone 54:26:96:BB:A4:CD 192.168.21.193 hermione-wired 192.168.21.194 toothless-wired # MAC address 48:5B:39:2B:8F:E8 192.168.21.195 6c-blade1 # ======================================================================================== |
| Media Center drives |
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8 bay SATA tower houses these drives:
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There are also these drive partitions:
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| Adding a new drive |
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To add a new drive:
/dev/disk/by-label/box-type-sizename /my-mount-location ext4 noatime 0 2
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| Adding a user to the server |
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su - # only needed if you want them to have their own group (otherwise use "users" group) groupadd #newuser# # the additional groups here are optional useradd #newuser# -m -g #newuser# -G users,wheel,audio,video,games,dvd,usb -s /bin/bash passwd #newuser# mkdir /home/#newuser# chown #newuser#:users /home/#newuser# # grant ssh access by adding to "AllowUsers" em /etc/ssh/sshd_config /etc/init.d/sshd restart # grant samba access to home folder # it's already set up in /etc/samba/smb.conf # but the user must be manually added to samba # use same pwd as before to sync them smbpasswd -a #newuser# /etc/init.d/samba restart # YOU PROBABLY HAVE TO RESTART ANY STUPID WINDOWS BOX before it will see things correctly! crazy # you can try this in Windows but it didn't work for me: # net use # net session \\samba.server.ip.address /delete |
| Updating mediawiki installation |
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cd /var/www/localhost/htdocs/mediawiki emacs LocalSettings_redirector.php (to hardcode each site) php maintenance/update.php (repeat for each site) emacs LocalSettings_redirector.php (to reset dynamic behavior) |
| Creating a new ssh key pair for no-password access to a remote system |
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wow I just had serious issues with basic ssh usage, so i'll put a summary on the wiki
basically most misunderstandings stem from describing these two:
client: machine that is trying to ssh into the server
server: machine that the client user wants to get to
most poor sots are just sitting on the client
and they create a pair and push their public key to the server
but in my case, more often, i want to create a pair on the server
and push the private key to the multiple places i need to connect FROM
when doing that, you have to push the public key into the server's authorized_keys
and configure the client to juggle multiple private keys
create a key pair:
ssh suser@server
ssh-keygen
use defaults
will create:
.ssh/id_rsa (private key)
.ssh/id_rsa.pub (public key)
put the public key in place:
cd .ssh
cat id_rsa.pub >>authorized_keys
put the private key on the client and configure:
scp id_rsa cuser@client:.ssh/id_rsa_server
ssh cuser@client
em .ssh/config
Host tdm thedigitalmachine.com
Hostname thedigitalmachine.com
IdentityFile ~/.ssh/id_rsa
User m
Host server
Hostname server.com
IdentityFile ~/.ssh/id_rsa_server
User suser
all is full of light
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| Back up a linux system to a second bootable drive |
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Steps:
These are the steps for backup of the dune box to the /spiceflow/2.0tb-newmovies/ drive. When we're done, we'll boot from that drive to prove we have a working standby system. rsync does an excellent job of copying just what we need. Test it with this: # a (archive mode -rlptgoD) v (verbose) x (don't cross filesystems) h (human-readable) n (dry run) rsync -avxhn --progress / /spiceflow/2.0tb-newmovies/ Do the job with this: rsync -avxh / /spiceflow/2.0tb-newmovies/ sent 28.10G bytes received 8.64M bytes 15.63M bytes/sec total size is 39.57G speedup is 1.41 There was def some old stuff in there worth cleaning up: /home/m/development/svn/mythtv... /var/tmp xbmc log files etc Next we fix /etc/fstab on the new drive to use the drive as root. Original config: /dev/disk/by-label/d-g2-root / ext3 noatime 0 1 /dev/disk/by-label/d-sp-20newmovies /spiceflow/2.0tb-newmovies ext4 noatime 0 2 New config (remember tho, we lose the 2gb drive): /dev/disk/by-label/d-g2-root /root-hot-drive ext3 noatime 0 1 /dev/disk/by-label/d-sp-20newmovies / ext4 noatime 0 2 Note: this never worked out for me due to my system's mix of ext3 and ext4. I'll retry once I migrate everything to ext4. Next, grub: mount /boot em /boot/grub/menu.lst Orig entry: title ----- linux-2.6.34-gentoo-r11_withext4 root (hd0,0) kernel /boot/linux-2.6.34-gentoo-r11_withext4 root=/dev/sda4 Add a new "standby" entry under it - do a "df" to find the root: title ----- ==STANDBY== linux-2.6.34-gentoo-r11_withext4 root (hd0,0) kernel /boot/linux-2.6.34-gentoo-r11_withext4 root=/dev/hda1 Then reboot to standby and see what we have... (no "latest" video library etc., but otherwise the same?) |
| BOX: tdm |
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| My primary server that does just about everything internet-related
P8P67LE mobo Intel i5 quad core names that are hosted:
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| BOX: dune |
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| My XMBC media center and samba-based storage server
AMD post-kernel tasks: make sure you update /etc/conf.d/modules for any new modules added update-modules module-rebuild populate (WHY DOESN'T FUSE SHOW UP?) module-rebuild rebuild (if you feel brave) module-rebuild list (if you want to do it manually) emerge ati-drivers sys-fs/fuse # etc, also try... emerge -a1 $(qlist -IC x11-drivers/) update-modules dispatch-conf eselect opengl set ati aticonfig --ovt opengl reboot |
| BOX: wimpy |
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| My main development workstation
P8P67LE mobo Intel i5 quad core boot is in /ubuntu/boot grub menu: /ubuntu/boot/grub/menu.lst post-kernel tasks: make sure you update /etc/conf.d/modules for any new modules added update-modules module-rebuild populate module-rebuild rebuild (if you feel brave) module-rebuild list (if you want to do it manually) emerge nvidia-drivers (etc) update-modules dispatch-conf eselect opengl set nvidia reboot if you break gentoo (or rather, if gentoo devs break gentoo, or open source hacks break gentoo, or whatever... but ultimately, you...)... boot into ubuntu su - ./chroot_to_gentoo (chroot) ./setup_chroot ** FIX IT ** to install a new kernel that ubuntu will serve up... build it in a chroot back in ubuntu, copy it: cp /mnt/gentoo/usr/src/linux/arch/x86_64/boot/bzImage /boot/linux-blahblbahba and update grub. you can change em both or just the second (and rerun grub-mkconfig >/boot/grub/grub.cfg): emacs /boot/grub/grub.cfg emacs /etc/grub.d/09_gentoo |
| BOX: wallee |
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| My quad-boot laptop
Macbook Pro quad boot (OS X, Windows 7, Ubuntu, gentoo) see blog entry for quad boot instructions -- gentoo --
-- to update kernel --
-- misc --
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| BOX: wallee networking |
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| Laptop has both wired and wifi adapters.
We set up custom network interface names to make it more clear. /etc/udev/rules.d/76-mdm-net.rules # This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.
# MDM following this to change nw interface names:
# http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=4&chap=2
#
# verified MAC addresses
# changed eth0 line to lan0
# changed eth1 line to wifi0
# PCI device 0x10de:0x0ab0 (forcedeth)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:26:4a:18:ed:58", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="lan0"
# PCI device 0x14e4:0x432b (wl)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:26:bb:07:d3:7d", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="wifi0"
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Maintenance of my music collection
udev: Assign unique names to your devices
Automatically mount and unmount your devices