ThinkPad X250

1. Download unofficial weekly build of Debian testing for amd64 (netinst) including SHA1SUMS file
2. Verify the downloaded image by using this command

   $ sha1sum -c SHA1SUMS

3. Write the image to USB flashdrive

   # cp firmware-testing-amd64-netinst.iso /dev/sdX
   # sync

Filesystem ext4 and TRIM (discard option or use fstrim command). Put “noatime” or “relatime” in the option of the partitions in the fstab file. Do not create swap partition. Change I/O scheduler if needed.

tmpfs for /tmp:

tmpfs   /tmp   tmpfs   noatime,nosuid,nodev,noexec   0   0

Add periodic cron, for example weekly. Put 'fstrim -a' in /etc/cron.weekly/fstrim

fstrim -av

systcl.conf, add “vm.swappiness = 10” or “vm.swappiness = 1”

lsblk lsblk -D

/sys/block/sdX/queue/rotational

/sys/block/sda/queue/discard_granularity

smartctl -a /dev/sdX

# sfdisk -d /dev/sdX

If you use LUKS encrypted partition, don't forget to activate “discard” option in crypttab. The implication is the less secure storage since the firmware knows where the data stored in the encrypted partition. LVM has also “discard” option.

edisk  UUID=XYZ none luks,discard

dmsetup table /dev/mapper/edisk --showkeys

sudo hdparm -I /dev/sda|grep TRIM

calibre dia git gimp cups eog evince ffmpeg file-roller freeplane frogr gdm gksu gnash
gnumeric gns3 libreoffice mc nixnote2 nmap plymouth plymouth-themes qemu rhythmbox
screen simple-scan synaptic tlp totem wine wireshark

adwaita-qt adwaita-qt4 gnome-themes-standard qt4-qtconfig

1. Atom
2. GNS3
3. Mozilla Firefox
4. Mozilla Thunderbird
5. Telegram
6. VirtualBox

Change HISTSIZE and HISTFILESIZE.

HISTSIZE=10000
HISTFILESIZE=10000

Change PS1 variable as needed.

Put your username to “sudo” group in group file in /etc directory.

1. Edit modules file. In my case, this file is configured for Intel graphics card

   # nano /etc/initramfs-tools/modules

   intel_agp
   drm
   i915 modeset=1

2. Edit grub file in directory /etc/default/

   GRUB_TIMEOUT=0
   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
   GRUB_GFXMODE=1024x768

   # update-grub2

3. Set Plymouth theme

   # plymouth-set-default-theme -l
   # plymouth-set-default-theme -R spinner

START_CHARGE_THRESH_BAT0=75
STOP_CHARGE_THRESH_BAT0=80
START_CHARGE_THRESH_BAT1=75
STOP_CHARGE_THRESH_BAT1=80

• Check badblocks of the partition

   # badblocks -v -s -w -t random /dev/sdXY

• Setup and initialize partition with LUKS

  # cryptsetup -v -y -s 256 luksFormat /dev/sdXY

• Open the LUKS-formatted partition

  # cryptsetup luksOpen /dev/sdXY yes

• Format the opened-partition with ext4 and label it with anything you want

  # mkfs.ext4 -L yourlabel /dev/mapper/yes