When installing a wireless network in our cabins, I had to make some optimizations, like buying bigger antennas. To verify that the signal got better at some key areas I went around and checked the signal, with this little script:
Then I imported the result in Google Sheets and drew a really simple blueprint over the cabins and plotted the measured areas to see how good the signal was.
Trying to figure out what packages has been changed since a specific date. A quick hack.
package_history() {
local since="${1}"
local action="${2:-install}"
action=${action,,}
action=${action^}
[[ -z "${since}" ]] && { echo "Need a valid date as first argument"; exit -1; }
sed -n '/^Start-Date: '"${since}"' /,$p' /var/log/apt/history.log | awk '/Start-Date:/ || /'"${action}"':/' | sed -r 's|\),|\)\n|g; s|('"${action}"': )|\1\n |'
}
Examples, if you want to know all packages installed since 2016-05-17:
package_history "2016-05-17"
If you want to know all packages removed since 2016-05-09:
package_history "2016-05-17" remove
Update: After a lot of troubleshooting and testing different combinations of my kernel parameters; I conclude that it works a lot better when leaving pcie_aspm=force (think I got it from an Arch wiki?), and also never resume when docked if the computer was hibernated on battery. This seems to be working even with the linux-image-generic-lts-xenial kernel. You can check this pastebin with the results and combination that I’ve tested.
To enable hibernate in the menu, create /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla with the following content:
[Re-enable hibernate by default in upower] Identity=unix-user:* Action=org.freedesktop.upower.hibernate ResultActive=yes [Re-enable hibernate by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate ResultActive=yes [Re-enable hibernate for multiple users by default in logind] Identity=unix-user:* Action=org.freedesktop.login1.hibernate-multiple-sessions ResultActive=yes
Update /etc/default/grub and add RESUME parameter set to your swap partition in GRUB_CMDLINE_LINUX_DEFAULT. Example:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_fbc=1 i915.enable_rc6=7"
Don’t forget to run sudo update-grub2.
Check if iwlwifi has any dependencies:
$ lsmod | egrep "^iwlwifi" iwlwifi 196608 1 iwlmvm
Add, in this case, iwlwifi and iwlmvm to /etc/pm/config.d/modules:
SUSPEND_MODULES="iwlmvm iwlwifi"
Create /etc/pm/sleep.d/99_wpa_supplicant:
#!/bin/sh case "$1" in resume|thaw) /usr/bin/pkill wpa_supplicant ;; esac
Don’t forget to make it executable, chmod +x /etc/pm/sleep.d/99_wpa_supplicant.
Killing wpa_supplicant on resume and thaw is needed due to bug #1311257.
And lastly, if you have TLP, make sure to restore previous device state on startup:
$ egrep "^RESTORE_" /etc/default/tlp RESTORE_DEVICE_STATE_ON_STARTUP=1
Note: I had hibernate working perfect, but then I upgraded to linux-image-generic-lts-xenial which caused KernelOops on every thawn. After reverting back it worked great again. I’m guessing the reason is that the gfx stack (xserver-xorg-video-intel-xenial etc.) isn’t available in 14.04 (yet?).
So, the very automated way:
git clone git@github.com:mgor/docker-ubuntu-i3-gaps-builder.git cd docker-ubuntu-i3-gaps-builder/ make
Packages available in packages/.
First, get the build environment and start it:
git clone git@github.com:mgor/docker-ubuntu-pkg-builder.git cd docker-ubuntu-pkg-builder make
Install the needed dependencies:
apt update apt install libxcb1-dev libxcb-keysyms1-dev \ libpango1.0-dev libxcb-util0-dev libxcb-icccm4-dev \ libyajl-dev libstartup-notification0-dev \ libxcb-randr0-dev libev-dev libxcb-cursor-dev \ libxcb-xinerama0-dev libxcb-xkb-dev libxkbcommon-dev \ libxkbcommon-x11-dev apt-get build-dep i3
Get i3-gaps from github[0].
git clone https://www.github.com/Airblader/i3 i3-gaps cd i3-gaps
If you want to run on the stable branch:
git checkout gaps git pull
Build the packages:
debuild -i -us -uc -b
If successful, the packages will be in ../. Transfer them to your host and install.
This is mostly a checklist for myself, might end up as a script, who knows?
sudo apt-get install unity-tweak-tool
sudo apt-get install compizconfig-settings-manager
sudo apt-get install indicator-multiload
Search for “System Load Indicator” in dash to enable it.
sudo apt-get install python-wnck python-appindicator cd ~/Downloads wget "http://ppa.launchpad.net/geod/ppa-geod/ubuntu/pool/main/i/indicator-workspaces/indicator-workspaces_0.6.4_all.deb" sudo dpkg -i indicator-workspaces_0.6.4_all.deb indicator-workspaces & disown
Right click on the indicator, chose “Preferences” and check “Start indicator at login”.
sudo apt-get install redshift-gtk
Remove icon “backdrop” in the Unity launcher, to get a cleaner look.
git clone https://github.com/mjsolidarios/unity-flatify-icons.git cd unity-flatify-icons sh unity-flatify-icons.sh
Start the settings manager by pressing Alt+F2 and entering about:config. Go to the “Launcher” tab and scroll down to the bottom. Set “Launcher Backlight Mode” to “Backlight Always Off” and “Launcher Icon Launch Animation” to “None”.
wget http://download.opensuse.org/repositories/home:Horst3180/xUbuntu_15.04/Release.key sudo apt-key add - < Release.key && rm -rf Release.key sudo sh -c "echo 'deb http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_15.10/ /' >> /etc/apt/sources.list.d/arc-theme.list" sudo apt-get update sudo apt-get install arc-theme
sudo add-apt-repository ppa:noobslab/icons sudo apt-get update sudo apt-get install emerald-icons-theme
cd ~/Downlods wget "https://github.com/adobe-fonts/source-code-pro/archive/2.010R-ro/1.030R-it.zip" mkdir -p ~/.local/share/fonts cd ~/.local/share/fonts unzip ~/Downloads/1.030R-it.zip fc-cache -f
Using Obsidian theme which is downloadable from gnome-look.org.
cd ~/Downloads wget http://gnome-look.org/CONTENT/content-files/73135-Obsidian.tar.bz2 cd /usr/share/icons sudo tar jxvf ~/Downlods/Obsidian.tar.bz2 sudo update-alternatives --install /usr/share/icons/default/index.theme x-cursor-theme /usr/share/icons/Obsidian/index.theme 20 sudo update-alternatvies --set x-cursor-theme /usr/share/icons/Obsidian/index.theme gsettings set org.gnome.desktop.interface cursor-theme "Obsidian" sudo cat <<EOF >> /etc/X11/Xresources/x11-common Xcursor.size: 24 Xcursor.theme: Obsidian EOF
This disables the grid both at login and after locking the screen.
gsettings set com.canonical.unity-greeter draw-grid false sudo xhost +SI:localuser:lightdm sudo su lightdm -s /bin/bash gsettings set com.canonical.unity-greeter draw-grid false