ShochuSystemSoftware

Keybinding Markup

---
title: ShochuSystemSoftware
---

[[_TOC_]]

# Permissions

## Sudoers

Disable per-tty authentication:

`/etc/sudoers.d/no-tty-tickets`: 
    Defaults !tty_tickets

# Storage

## Partitioning

cgpt add -i 1 -b 8671232 -s 6156288 /dev/sda
    # force check, ignore size/corruption warnings
    e2fsck /dev/sda1
    # resize to partition limit
    resize2fs /dev/sda1
    # new partition  ("-i 13" is optional)
    cgpt add -i 13 -b 14827520 -s 224690176 -t rootfs  /dev/sda

New layout:

64       16384      11  ChromeOS firmware
           16450           1       9  ChromeOS reserved
           16451           1      10  ChromeOS reserved
           20480       32768       2  ChromeOS kernel
           53248       32768       4  ChromeOS kernel
           86016       32768       8  Linux data
          249856       32768      12  EFI System Partition
          282624     4194304       5  ChromeOS rootfs
         4476928     4194304       3  ChromeOS rootfs
         8671232     6156288       1  Linux data
        14827520   224690176      13  ChromeOS rootfs (new root)
       239517696       32768       6  ChromeOS kernel
       239550464    10485760       7  ChromeOS rootfs

## LUKS

Algorithm benchmarks:

chrx@shochu:~$ cryptsetup benchmark
    # Tests are approximate using memory only (no storage IO).
    PBKDF2-sha1       608929 iterations per second
    PBKDF2-sha256     399001 iterations per second
    PBKDF2-sha512     269141 iterations per second
    PBKDF2-ripemd160  362578 iterations per second
    PBKDF2-whirlpool  134157 iterations per second
    #  Algorithm | Key |  Encryption |  Decryption
         aes-cbc   128b   119.0 MiB/s   139.9 MiB/s
     serpent-cbc   128b    46.9 MiB/s   178.5 MiB/s
     twofish-cbc   128b   102.1 MiB/s   144.3 MiB/s
         aes-cbc   256b    93.2 MiB/s   102.1 MiB/s
     serpent-cbc   256b    45.7 MiB/s   178.6 MiB/s
     twofish-cbc   256b   100.5 MiB/s   144.7 MiB/s
         aes-xts   256b   137.7 MiB/s   136.7 MiB/s
     serpent-xts   256b   172.7 MiB/s   169.0 MiB/s
     twofish-xts   256b   131.1 MiB/s   131.2 MiB/s
         aes-xts   512b   104.4 MiB/s   103.6 MiB/s
     serpent-xts   512b   172.7 MiB/s   169.3 MiB/s
     twofish-xts   512b   130.9 MiB/s   130.9 MiB/s

Encrypt:

cryptsetup -c serpent-xts-plain64 -s 512 luksFormat /dev/sda13
    cryptsetup luksOpen --allow-discards /dev/sda13 crypt-root

Benchmark:

root@shochu:/home/chrx# bonnie++ -f -d ./tmp -r 512 -s 1600 -n 0 -u root
    Using uid:0, gid:0.
    Writing intelligently...done
    Rewriting...done
    Reading intelligently...done
    start 'em...done...done...done...done...done...
    Version  1.97       ------Sequential Output------ --Sequential Input- --Random-
    Concurrency   1     -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
    Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
    shochu        1600M           163279  16 158908  10           +++++ +++ +++++ +++
    Latency                        1914ms    2300ms              1653us    4015us
    
    1.97,1.97,shochu,1,1453330209,1600M,,,,163279,16,158908,10,,,+++++,+++,+++++,+++,,,,,,,,,,,,,,,,,,,1914ms,2300ms,,1653us,4015us,,,,,,

## LVM2

Enable discards in `/etc/lvm/lvm.conf`:

# [...]
    devices {
       # [...]
       issue_discards = 1
       # [...]
    }
    # [...]

pvcreate /dev/mapper/crypt-root
    vgcreate vg-root /dev/mapper/crypt-root
    vgchange -a y vg-root
    # don't zero
    lvcreate -Zn -n root -L1g vg-root
    lvcreate -Zn -n usr -L25G vg-root
    lvcreate -Zn -n var -L5g vg-root
    lvcreate -Zn -n tmp -L1.5g vg-root
    lvcreate -Zn -n home -l100%FREE vg-root

Resultant LVs:

LV   VG      Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
      home vg-root -wi-a----- 74.64g
      root vg-root -wi-a-----  1.00g
      tmp  vg-root -wi-a-----  1.50g
      usr  vg-root -wi-a----- 25.00g
      var  vg-root -wi-a-----  5.00g

## Ext4

for i in tmp usr var home ; do mkfs.ext4 -m  /dev/vg-root/$i ; done
    cd /mnt
    for i in root tmp usr var ; do mkdir "$i" && mount /dev/vg-root/$i "./$i"; done
    for i in tmp usr var ; do cp -a /$i/* $i/ ; done
    tar cvf /mnt/usr/root.tar --one-file-system  /
    cd /mnt/root 
    tar xvf ../usr/root.tar  --exclude=usr --exclude=var

## fstab

/dev/mapper/vg--root-root / ext4 defaults,discard,relatime 1 1
    /dev/mapper/vg--root-usr /usr ext4 defaults,discard,relatime 0 2
    /dev/mapper/vg--root-var /var ext4 defaults,discard,relatime 0 2
    /dev/mapper/vg--root-tmp /tmp ext4 defaults,discard,relatime 0 2
    /dev/mapper/vg--root-home /home ext4 defaults,discard,relatime 0 2

## Trim support

*   <http://blog.neutrino.es/2013/howto-properly-activate-trim-for-your-ssd-on-linux-fstrim-lvm-and-dmcrypt/>

# Keyboard

Search key is Overlay1_Enable.

<http://unix.stackexchange.com/questions/39547/dead-compose-keys-not-working-in-gtk-apps-since-upgrade>

Other keys:

| Keys                                  | Symbol                  |
|:------------------------------------- | ----------------------- |
| Search + [                            | Keyboard backlight down |
| Search + ]                            | Keyboard backlight up   |
| Search + Alt                          | Caps Lock               |
| Search + Backspace                    | Delete                  |
| Search + <AB09> (. or v) | Insert                  |
| Search + Left                         | Home                    |
| Search + Right                        | End                     |
| Search + Up                           | PgUp       |
| Search + Down                         | PgDn       |

## Compose Key

*   Not working in Xubuntu by default since 14.04. Need ibus (and ibus-gtk?) installed.

Run as part of the session:

ibus-daemon --xim -d

# Shochu Reinstallation

Using GalliumOS 2.1

## Partitioning

Partition Table: msdos
    Disk Flags: 
    
    Number  Start       End            Size           Type      File system  Flags
     1      1048576B    511705087B     510656512B     primary   ext2         boot
     2      512752640B  128035323903B  127522571264B  extended
     5      512753664B  128035323903B  127522570240B  logical

## LUKS

aes-xts-plain64 sha256

## LVM

LV   VG           Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
      home galliumos-vg -wi-a----- 50.00g                                                    
      root galliumos-vg -wi-a----- 10.00g                                                    
      usr  galliumos-vg -wi-a----- 30.00g

# Bluetooth

## Microsoft Mouse 3600

Doesn't pair by default needs "GATT" bluetoothd experimental feature. Enable it and restart bluetooth.

`/etc/default/bluetooth`:

NOPLUGIN_OPTION="-E"

[19]: ShochuSystemSoftware?action=sourceblock&num=1
 [20]: ShochuSystemSoftware?action=sourceblock&num=2
 [22]: ShochuSystemSoftware?action=sourceblock&num=3
 [24]: ShochuSystemSoftware?action=sourceblock&num=4

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