Maintenance reference: Difference between revisions

Revision as of 08:57, 23 September 2013

Reference

LAN IP addresses

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
8 bay SATA tower houses these drives: 2.0tb archive (sdb right?) 250gb landofthelost circa ABB timeframe /dev/disk/by-label/LandOfTheLost /dev/sdc1 1.5tb raid drive #1 /dev/disk/by-label/d-sp-raid -> ../../sdd1 2.0tb latest /dev/disk/by-label/d-sp-20newmovies -> ../../sde1 1.5tb raid drive #2 (needs label change maybe)
There are also these drive partitions: / /dev/sda4 ubuntu root ub_root -> ../../sda5 /vista /dev/sda3

Adding a new drive
To add a new drive: ls /dev/sd* # and make note of what you have stuff the new drive in the SATA tower or plug it into a SATA socket ls /dev/sd* # you should now see something new, like [/dev/sdf] parted /dev/sdf print # should show nothing or errors mklabel gpt # this sets the drive up for "big" >2TGB partition labeling - WARNING: TRASHES EVERYTHING ON THE DRIVE mkpart primary ext4 0 -1s # makes an ext4 primary partition that goes from start (0) to end (-1s), yay quit # yeah weird but that's how you exit, things are changed as you go (oops should have told you that before) mkfs.ext4 -m 0 /dev/sdf1 # the [-m 0] is very important; without it, goofy ext4 wastes 5% "saved for root" wtf mount /dev/sdf1 /somewhere # make sure it looks good! umount # we are NOT going to be manually mounting! we need to label the drive and put it in /etc/fstab e2label /dev/sdb1 box-type-sizename # what a stupid f'in name for that util emacs /etc/fstab - and put in an entry like this: /dev/disk/by-label/box-type-sizename /my-mount-location ext4 noatime 0 2 mount /my-mount-location # now it will be there when you reboot! but do this to get it NOW :-) Note that if you mount the new drive under /spiceflow, samba will already be serving it up, whoop!

Adding a user to the server

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

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

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

Back up a linux system to a second bootable drive
Steps: We want to copy all files from the root drive to a new drive. We also want to update the boot menu to boot off the new drive. We also want to change /etc/fstab on the second drive to use the new root path. 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?)

wallee gentoo networking

Laptop has both wired and wifi adapters.

We set up custom network interface names to make it more clear.

I had installed several tools when attempting to get this going. DO NOT DO THAT, they interfere with one another. Removing NetworkManager and going with the highly-recommended wpa_supplicant and its graphical tools wpa_gui and wpa_cli.

I'm documenting this since it's so basic yet such a bitch.

/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"

Next you have to set up these weird symlinks:

cd /etc/init.d
ln -s net.lo net.lan0
ln -s net.lo net.wifi0

Now add them to runlevels:

rc-update add net.lan0 default
rc-update add net.wifi0 default

Now add them to runlevels:

rc-update add net.lan0 default
rc-update add net.wifi0 default

Fix the system so that only one is required for startup to work... /etc/rc.conf

rc_depend_strict="NO"

No, we're not even close to done yet... We have to CUT the firmware out of the proprietary driver. Wow.

su -
emerge -av b43-fwcutter # NOT THIS, DAAAMN: bcm43xx-fwcutter
emerge -av sys-firmware/b43-firmware
export FIRMWARE_INSTALL_DIR="/lib/firmware"
mkdir macbook_bcm43xx_wireless_driver
cd macbook_bcm43xx_wireless_driver
wget http://www.lwfinger.com/b43-firmware/broadcom-wl-5.100.138.tar.bz2
tar xjf broadcom-wl-5.100.138.tar.bz2
b43-fwcutter -w "$FIRMWARE_INSTALL_DIR" broadcom-wl-5.100.138/linux/wl_apsta.o
modprobe b43
/etc/init.d/net.wifi0 start

Nope. What a fuckbucket of retardedness. Look at the notes this guy made - brief but heavy - i think i need to purge b43 and get the "wl" driver working instead.

BOX: tdm
My primary server that does just about everything internet-related P8P67LE mobo Intel i5 quad core names that are hosted: thedigitalmachine.com thedigitalage.org

BOX: dune

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
 module-rebuild rebuild (if you feel brave)
 module-rebuild list (if you want to do it manually)
 emerge ati-drivers # etc, also try...
 emerge -a1 $(qlist -IC x11-drivers/)
 update-modules
 dispatch-conf
 eselect opengl set ati
 aticonfig --ovt opengl # "no supported adapters"?
 reboot

BOX: wimpy

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
My quad-boot laptop Macbook Pro quad boot (OS X, Windows 7, Ubuntu, gentoo) see blog entry for quad boot instructions -- gentoo -- see this for kernel parameters emerge microcode-ctl (and made it a module in kernel) also did everything else I could on this page (some EFI stuff was missing, who cares) - did i do too much? add m to a bunch of groups: for x in wheel cdrom cdrw usb video ; do gpasswd -a m $x ; done using Xfce (everybody's doing it) echo "exec startxfce4" > ~/.xinitrc using nvidia driver eselect opengl set nvidia run nvidia-xconfig using gdm emacs /etc/conf.d/xdm rc-update add xdm default using NetworkManager + consolekit (needed for applet) + nm-applet (for Xfce taskbar applet, where it all happens) + networkmanager-openconnect network driver: broadcom-sta Checking for suitable kernel configuration options... CONFIG_MAC80211: should not be set. But it is. Please check to make sure these options are set correctly. -- to update kernel -- under gentoo, ubunbu should already be mounted; make sure it's available at /ubuntu cd /usr/src/linux build a new kernel as usual make menuconfig, or make oldconfig, or whatever make && make modules_install emerge nvidia-drivers cp arch/x86_64/boot/bzImage /ubuntu/boot/linux-3.10.7-gentoo_oldconfig carefully fix up grub, ubuntu grub is being used we inject our gentoo boot lines into /boot/grub/grub.cfg through /etc/grub.d/11-gentoo-proxy which gets its information from /etc/grub.d/proxifiedScripts/gentoo we can modify grub directly from gentoo - you have to change both grub.cfg AND /etc/grub.d/proxifiedScripts/gentoo to keep things from getting clobbered later or go into ubuntu and change /etc/grub.d/proxifiedScripts/gentoo and run this... grub-mkconfig >/boot/grub/grub.cfg reboot! -- misc -- heres what we need in fstab to mount ubuntu in gentoo with [mount /ubuntu]... mount /dev/disk/by-path/pci-0000\:00\:0b.0-scsi-0\:0\:0\:0-part5 /ubuntu

Maintenance of my music collection

OS X basics

DOS basics

Update Boost

udev: Assign unique names to your devices

Automatically mount and unmount your devices

udev: Autorun programs when connecting your devices

Configure Eclipse

Configure Emacs

Configure MythTV

Basic MythTV plugin configuration