Author: Otto Odgaard

No Recursion Required

Fetching all the records from a multi page API endpoint without recursion back to the same function. Example in JavaScript.

const getAllProducts = async () => {
  // data and options is set elsewhere in this case
  data['maxRecords'] = 250;
  let res;
  let products = [];
  let page = 1;

  do {
    res = await axios.post(url, data, options);
    products = [...products, ...res.data.pageRecords];
    count = res.data.pageRecords.length;
    data['page'] = page + 1;
  } while (count === data['maxRecords'])

  return products;
}

Style Budgie on Xubuntu

Install prerequisites

sudo apt install budgie-desktop
sudo apt-add-repository ppa:tista/adapta
sudo apt install papirus-icon-theme adapta-gtk-theme breeze-cursor-theme

Select Budgie Desktop from the top right of the login screen.

Run Budgie Desktop Settings

Select

Widgets: Adapta
Icons: Papirus
Cursors: breeze_cursors
Select Position: Bottom

OpenOffice Manual Install

  • Download deb .tar.gz file
    e.g: Apache_OpenOffice_4.1.7_Linux_x86-64_install-deb_en-GB.tar.gz
  • Extract it to a temporary directory
    tar xf Apache_OpenOffice_4.1.7_Linux_x86-64_install-deb_en-GB.tar.gz
  • Make a subdirectory to extract the deb files to and cd to it.
    mkdir tmp
    cd tmp
  • Run the following script to extract the contents of every deb file:
for file in find ../*.deb
 do
   ar -xv "$file"
   tar xf data.tar.gz
   rm -f data.tar.gz control.tar.gz debian-binary
 done
  • Move opt/openoffice4 to /opt/
    sudo mv ./opt/openoffice4 /opt/
  • Run /opt/openoffice4/program/soffice

You could now create a .desktop file and set its icon.

Solus Linux – Repo change

Swapping out the Solus repo from https to http so we can cache it in a local server.

$ eopkg lr
 Solus [active]
    https://mirrors.rit.edu/solus/packages/shannon/eopkg-index.xml.xz
$ sudo eopkg ar solus http://mirrors.rit.edu/solus/packages/shannon/eopkg-index.xml.xz
Repo solus added to system.
 Updating repository: solus
 eopkg-index.xml.xz.sha1sum     (40.0  B)100%      2.96 MB/s [00:00:00] [complete]
 eopkg-index.xml.xz             (2.3 MB)100%    328.90 KB/s [00:00:01] [complete]
 Package database updated.
$ sudo eopkg rr Solus
Repo Solus removed from system.

Speeding up freebsd-update

When using freebsd-update it can take a long time to complete. I’ve been looking at ways of speeding it up.

During the update process, it’s not uncommon for it to download 50,000+ files one at a time! Lets fix that.

The update below will run 8 copies of phttpget in parallel. xargs takes care of making sure each instance of phttpget has it’s own unique list of files.

# man xargs
...
-P maxprocs
      Parallel mode: run at most maxprocs invocations of
      utility at once.  If maxprocs is set to 0, xargs will             
      run as many processes as possible.
...
# ee /usr/sbin/freebsd-update
...

fetch_setup_verboselevel () {
         case ${VERBOSELEVEL} in
         debug)
                 QUIETREDIR="/dev/stderr"
                 QUIETFLAG=" "
                 STATSREDIR="/dev/stderr"
                 DDSTATS=".."
                 XARGST="-t"
                 NDEBUG=" "
                 ;;
         nostats)
                 QUIETREDIR=""
                 QUIETFLAG=""
                 STATSREDIR="/dev/null"
                 DDSTATS=".."
                 XARGST="-P 8" # UPDATED <<
                 NDEBUG=""   
                 ;;
         stats)
                 QUIETREDIR="/dev/null"
                 QUIETFLAG="-q"
                 STATSREDIR="/dev/stdout"
                 DDSTATS=""
                 XARGST="-P 8" # UPDATED <<
                 NDEBUG="-n"
                 ;;
         esac
 }

...

Solus Linux + OpenZFS

Solus is a great Linux distribution. Very clean and has everything I need, expect ZFS.

Building zfs is also discussed here: https://github.com/zfsonlinux/zfs/wiki/Building-ZFS

NOTE: zfs-on-linux 0.8.3 and previous versions are NOT compatible with Linux kernel 5.5

You’ll need to install the development tools and some packages (Kernel modules are currently not building without libelf-devel)

Basic knowledge of how to use the terminal is assumed. 

sudo eopkg install -c system.devel
sudo eopkg install git linux-current-headers libelf-devel

Lets build it. As of writing, the master branch is 0.8.0-rc2. I’m using –depth 1 so we don’t get the history or tags (optional).

Recommendation: Download the release archive and not the latest git source.

git clone --depth 1 https://github.com/zfsonlinux/zfs
cd zfs
sh autogen.sh
./configure
make -s -j$(nproc)
sudo make install
sudo depmod

Or if you’ve just updated and a new kernel was installed (before rebooting) you can use (replace with correct path):

./configure --with-linux=/usr/src/linux-headers-4.20.8-110.current

While there is a script to load the kernel modules ( /usr/local/share/zfs/zfs.sh ), there does not seem to be a service script that fires it up on boot.

Create /etc/modules-load.d/zfs.conf with your favorite editor and add the following:

zavl
zunicode
spl
znvpair
zcommon
icp
zlua
options zfs zfs_autoimport_disable=0
zfs

Enable the services:

sudo systemctl enable zfs-import-cache.service
sudo systemctl enable zfs-import-scan.service
sudo systemctl enable zfs-import.target
sudo systemctl enable zfs-mount.service
sudo systemctl enable zfs-share.service
sudo systemctl enable zfs-zed.service
sudo systemctl enable zfs.target

Time to reboot and check everything worked.

lsmod | grep zfs

 zfs                  4087808  8
 zlua                  180224  1 zfs
 icp                   311296  1 zfs
 zcommon                90112  1 zfs
 znvpair                90112  2 zfs,zcommon
 zunicode              335872  1 zfs
 zavl                   16384  1 zfs
 spl                   118784  5 zfs,icp,znvpair,zcommon,zavl

Caveats

  • You will have to rebuild zfs every time the kernel is updated
  • If the kernel is updated your zfs pools will not mount on the next reboot – don’t mount any critical file systems which would prevent you from booting, onto a zfs pool.
  • It takes a little longer to boot since it scans for pools and mounts them

This tutorial was performed on a clean install of Solus Budgie 3.9999 after running eopkg up and rebooting.

Discus and comment here: https://getsol.us/forums/viewtopic.php?f=11&t=13207