Deboostrap Debian 11

 https://github.com/aomgiwjc/Unix-Bootstrap-Installs/wiki/Debian-Bootstrap-Chroot-Install---Ext4,-one-drive

https://www.youtube.com/watch?v=oKnkOwdysNs

Apt pinning

https://dug.net.pl/tekst/163/priorytety_pakietow_(apt_pinning__pin_priority)/

root@dw:~# cat /etc/apt/preferences.d/99debian-unstable 

Package: *

Pin: release a=unstable

Pin-Priority: 10

root@dw:~# 

Debian sources.list

https://www.dug.net.pl/tekst/136/lista_repozytoriow_(sources_list)_dla_debiana/

BSD zfs home na oddzielnym dysku

Going by memory since it's been a long while, this is how you do it after the fact:

zfs is datasets. the installer by default create a dataset named user/home:
zroot/usr/home 24.6G 179G 24.6G /usr/home
making sure noone is logged in or using /usr/home/username, so
as root from a console you use zfs commands to rename the existing zroot/usr/home dataset something like
zfs rename zroot/usr/home zroot/usr/home.ORIG
use zfs commands to change the mountpoint, something like
zfs set mountpoint=/usr/home.ORIG zroot/usr/home.ORIG

then assuming your second device is hooked, you use gpart to set it up, set gpt scheme on it, create a partition of type freebsd-zfs, make sure you align and label it as something like "zfs1" or something meaningful
then simply use zfs commands to create a new pool on that partition
zpool create storage gpt/zfs1 or ada1p1 (of course you use your correct label and device names)
then create your new user/home dataset:
zfs create storage/home
set the mountpoint to /usr/home
zfs set mountpoint=/usr/home storage/home

Now you have your home directories on a different device. If you have data in your existing user directories, many ways to copy it over a simple way would be to use tar piping through stdout/stdin. Or rsync or cp -R /usr/home.ORIG /usr/home.
One could also use zfs send/zfs receive if desired. I find that for a home user system with a single or couple of users, cp or tar works good enough.

The installer you would need to drop to a shell at some point and do the partitioning and zpool and dataset creation by hand, pay attention to the mount points, lots of things to keep track of.
That is why people suggested do the install on a single disk, do not create a user, simply get the system up and running. Then you do what I've outlined here, since there are no user directories yet, nothing to copy.

ZFS I learned you want to get yourself copies of the following books by Michael W Lucas:
FreeBSD Mastery: Storage Essentials
FreeBSD Mastery: ZFS (with Allan Jude)
FreeBSD Mastery: Advanced ZFS (with Allan Jude)
Pretty much any "How do I do this" question on ZFS I've ever had are answered in them.

Wyświetlanie danych na ekran i do pliku (tee)

The command you want is named tee:

foo | tee output.file

For example, if you only care about stdout:

ls -a | tee output.file

If you want to include stderr, do:

program [arguments...] 2>&1 | tee outfile

2>&1 redirects channel 2 (stderr/standard error) into channel 1 (stdout/standard output), such that both is written as stdout. It is also directed to the given output file as of the tee command.

Furthermore, if you want to append to the log file, use tee -a as:

program [arguments...] 2>&1 | tee -a outfile

 

Shrinking images on Linux

by FrozenCowFriday February 21, 2013

When creating images from existing ISOs you often need to allocate a number of MB for the image to at least fit the files that are in the ISO. Predicting the exact size of the image is hard, even for a program. In this case you will create an image that is larger than actually needed: the image is much larger than the files on the image are combined.

This post will show how to shrink an existing image to a more optimal size. We will do this on Linux, since all required tools are available there: GParted, fdisk and truncate.

Requirements

• A Linux PC
• Some knowledge how the terminal works will helps
• The unoptimal image (myimage.img in this example)

Creating loopback device

GParted is a great application that can handle partition tables and filesystems quite well. In this tutorial we will use GParted to shrink the filesystem (and its accompaning partition in the partition table).

GParted operates on devices, not simple files like images. This is why we first need to create a device for the image. We do this using the loopback-functionality of Linux.

First we will enable loopback if it wasn't already enabled:

$ sudo modprobe loop

Now we can request a new (free) loopback device:

$ sudo losetup -f

This will return the path to a free loopback device. In this example this is /dev/loop0.

Next we create a device of the image:

$ sudo losetup /dev/loop0 myimage.img

Now we have a device /dev/loop0 that represents myimage.img. We want to access the partitions that are on the image, so we need to ask the kernel to load those too:

$ sudo partprobe /dev/loop0

This should give us the device /dev/loop0p1, which represents the first partition in myimage.img. We do not need this device directly, but GParted requires it.

Resize partition using GParted

Next we can load the device using GParted:

$ sudo gparted /dev/loop0

This should show a window similar to the following:

Now notice a few things:

• There is one partition.
• The partition allocates the entire disk/device/image.
• The partition is filled partly.

We want to resize this partition so that is fits it content, but not more than that.

Select the partition and click Resize/Move. A window similar to the following will popup:

Drag the right bar to the left as much as possible.

Note that sometimes GParted will need a few MB extra to place some filesystem-related data. You can press the up-arrow at the New size-box a few times to do so. For example, I pressed it 10 times (=10MiB) for FAT32 to work. For NTFS you might not need to at all.

Finally press Resize/Move. You will return to the GParted window. This time it will look similar to the following:

Notice that there is a part of the disk unallocated. This part of the disk will not be used by the partition, so we can shave this part off of the image later. GParted is a tool for disks, so it doesn't shrink images, only partitions, we have to do the shrinking of the image ourselves.

Press Apply in GParted. It will now move files and finally shrink the partition, so it can take a minute or two, most of the time it finishes quickly. Afterwards close GParted.

Now we don't need the loopback-device anymore, so unload it:

$ sudo losetup -d /dev/loop0

Shaving the image

Now that we have all the important data at the beginning of the image it is time to shave of that unallocated part. We will first need to know where our partition ends and where the unallocated part begins. We do this using fdisk:

$ fdisk -l myimage.img

Here we will see an output similar to the following:

Disk myimage.img: 6144 MB, 6144000000 bytes, 12000000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000ea37d

      Device Boot      Start         End      Blocks   Id  System
myimage.img1            2048     9181183     4589568    b  W95 FAT32

Note two things in the output:

• The partition ends on block 9181183 (shown under End)
• The block-size is 512 bytes (shown as sectors of 1 * 512)

We will use these numbers in the rest of the example. The block-size (512) is often the same, but the ending block (9181183) will differ for you. The numbers mean that the parition ends on byte 9181183*512 of the file. After that byte comes the unallocated-part. Only the first 9181183*512 bytes will be useful for our image.

Next we shrink the image-file to a size that can just contain the partition. For this we will use the truncate command (thanks uggla!). With the truncate command need to supply the size of the file in bytes. The last block was 9181183 and block-numbers start at 0. That means we need (9181183+1)*512 bytes. This is important, else the partition will not fit the image. So now we use truncate with the calculations:

$ truncate --size=$[(9181183+1)*512] myimage.img

Now copy the new image over to your phone, where it should act exactly the same as the old/big image.

Opensuse Tumbleweed / Leap drukarka i skaner brother

 Step 0 sudo zypper in libusb-0_1-4 libusb-0_1-4-32bit

 

Step1. Download the tool.(linux-brprinter-installer-*.*.*-*.gz)

The tool will be downloaded into the default "Download" directory.
(The directory location varies depending on your Linux distribution.)
e.g. /home/(LoginName)/Download

Step2. Open a terminal window.

Step3. Go to the directory you downloaded the file to in the last step. By using the cd command.

e.g. cd Downloads

Step4. Enter this command to extract the downloaded file:

Command: gunzip linux-brprinter-installer-*.*.*-*.gz

e.g. gunzip linux-brprinter-installer-2.1.1-1.gz

Step5. Get superuser authorization with the "su" command or "sudo su" command.

Step6. Run the tool:

Command: bash linux-brprinter-installer-*.*.*-* Brother machine name
e.g. bash linux-brprinter-installer-2.1.1-1 MFC-J880DW

Step7. The driver installation will start. Follow the installation screen directions.
 

 When you see the message "Will you specify the DeviceURI ?",

 For USB Users: Choose N(No)
 For Network Users: Choose Y(Yes) and DeviceURI number.

The install process may take some time. Please wait until it is complete.

 

scanner 

 sudo nano /etc/sane.d/dll.conf jeśli nie ma do pliku należy dopisać brother3
 

sudo zypper in sane tcsh libncurses5-32bit psutils xsane sane sane-backends simle-scan

prawdopodobnie /udev/rules.d/56-sane-backends-autoconfig.rules

#Brother DCP-145C

 ATTRS{idVendor}=="04f9", ATTRS{idProduct}=="0206", ENV{libsane_matched}="yes"