sudo aptitude update
sudo aptitude install putty-tools

puttygen ~/.ssh/id_rsa -o key.ppk

U niektórych dostawców internetu połączenia FTP i SSH są zrywane po kilku minutach bezczynności.

Można to naprawić poprzez:

1. SSH

cd ~
vim .ssh/config

Host *
ServerAliveInterval 180

2. FTP - Filezilla

Edit -> Settings -> Connection -> FTP

[x] Send FTP keep-alive commands

Edit -> Settings -> Appearance -> Sorting and Threading -> Default Threading -> Unthreaded

Źródło: ChatPGT

Thunderbird 140 (English UI) da się to wyklikać globalnie w jednym miejscu. Zrób tak:

Wyłączanie wątków globalnie (dla wszystkich folderów)

1. Otwórz Thunderbirda i kliknij ☰ (Application menu) w prawym górnym rogu.

2. Wejdź w Settings → Appearance.

3. W sekcji Select default threading for new folders wybierz Unthreaded.

4. Przewiń niżej do Select folders to apply new settings to i kliknij All existing folders → potwierdź.
   To ustawi „Unthreaded” jako domyślne i zastosuje to do wszystkich dotychczasowych folderów. Mozilla Support

(Opcjonalnie) Dla pojedynczego folderu „tu i teraz”

1. Wejdź do konkretnego folderu (np. Inbox).

2. Wciśnij Alt (pojawi się klasyczne menu) → View → Sort by → Unthreaded.
   To działa tylko dla bieżącego folderu — globalne ustawienie z kroku wyżej załatwia całość. Mozilla Support

Jeśli chcesz, przy okazji w Appearance możesz też ustawić domyślne sortowanie (np. Default Sort field: Date i Descending) i również zastosować to do wszystkich folderów tym samym przyciskiem All existing folders.

Po otwarciu dowolnej folderu i kliknięciu prawym klawiszem myszy nie ma opcji "Nowy dokument".

cd vim ~/Templates

touch new_file.txt

https://www.fortinet.com/support/product-downloads#vpn

https://links.fortinet.com/forticlient/deb/vpnagent

https://filestore.fortinet.com/forticlient/downloads/forticlient_vpn_7.4.3.1736_amd64.deb

sudo dpkg -i forticlient_vpn_7.4.3.1736_amd64.deb

for f in `find . -name "*.jpg"`; do convert $f -resize 50% $f; done

Źródło: https://stackoverflow.com/questions/10802606/how-to-batch-resize-images-in-ubuntu-recursively-within-the-terminal

tail -n +2 source_file.txt > destination_file.txt

Przydatne przy odtwarzaniu bazy danych gdzie mysqldump dodaje na początku zabezpieczenie:

/*!999999\- enable the sandbox mode */

Źródło: https://stackoverflow.com/questions/339483/how-can-i-remove-the-first-line-of-a-text-file-using-bash-sed-script

sudo apt install libheif-examples
for file in *.HEIC; do heif-convert $file ${file%.HEIC}.jpg; done

Źródło: https://ubuntuhandbook.org/index.php/2021/06/open-heic-convert-jpg-png-ubuntu-20-04/

yum remove epel-release

yum clean all

sudo yum -y install yum-utils

sudo yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

sudo yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional

sudo yum install certbot

sudo yum install certbot-nginx

Źródło: https://stackoverflow.com/questions/53545436/no-package-certbot-available

Menu -> Settings -> Keyboard -> Application shortcuts -> [+Add]

dm-tool lock -> Super + L

Źródło: https://askubuntu.com/questions/1242110/after-upgrading-to-ubuntu-20-04-lockscreen-not-working

systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target

Źródło:

https://www.tecmint.com/disable-suspend-and-hibernation-in-linux/

https://www.linuxquestions.org/questions/debian-26/how-to-prevent-debian-buster-from-hibernating-4175661058/

after aptitude install

W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/sw_method_init.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/sw_bundle_init.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/sw_nonctx.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/sw_ctx.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/gpccs_sig.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/gpccs_data.bin for module nouveau
W: Possible missing firmware /lib/firmware/nvidia/gp100/gr/gpccs_inst.bin for module nouveau
...

vim /etc/apt/sources.list

change this

deb http://deb.debian.org/debian/ buster main

to this

deb http://deb.debian.org/debian/ buster main non-free contrib

aptitude update

aptitude install nvidia-detect

nvidia-detect

Detected NVIDIA GPUs:
02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GF100 [GeForce GTX 480] [10de:06c0] (rev a3)

Checking card:  NVIDIA Corporation GF100 [GeForce GTX 480] (rev a3)
Your card is only supported up to the 390 legacy drivers series.
It is recommended to install the
    nvidia-legacy-390xx-driver
package.

aptitude install nvidia-legacy-390xx-driver

Źródło: https://linuxconfig.org/how-to-install-nvidia-driver-on-debian-10-buster-linux

1. Stop the VirtualBox machine.

2. Convert VDI Image to RAW Disk Format

vboxmanage clonehd --format RAW /home/user/VirtualBox_VMs/Debian_vm.vdi /home/user/VirtualBox_VMs/Debian_vm.img

3. Copy RAW image to KVM server

rsync -av --progress /home/user/VirtualBox_VMs/Debian_vm.img user@kvmserver:/home/kvm/Debian_vm.img

4. Convert RAW Image Disk Format to KVM Format

qemu-img convert -f raw Debian_vm.img -O qcow2 Debian_vm.qcow2

Źródło: https://www.tecmint.com/migrate-virtualbox-vms-into-kvm-vms/

mkdir /home/images

virsh pool-destroy default

virsh pool-edit default

change

<path>/var/lib/libvirt/images</path>

to

<path>/home/images</path>

virsh pool-start default

Create new pool for ISO files

virsh pool-define-as --name iso --type dir --target /home/iso/
virsh pool-start iso
virsh pool-autostart iso

https://ostechnix.com/how-to-change-kvm-libvirt-default-storage-pool-location/

- Shut down the guest machine.
- In the 'Display spice' section, select "All interfaces" instead of 'Localhost only' in "Address"
- Restart the guest machine

https://askubuntu.com/questions/780862/virt-manager-to-remote-host-continuous-password-prompt-over-ssh

Plik konfiguracyjny z wirtualką na XEN

kernel = '/usr/lib/xen-4.8/boot/hvmloader'
builder = 'hvm'

vcpus       = '1'
memory      = '2048'
shadow_memory = 8

localtime = 1

#  Disk device(s).
disk        = [
                'file:/xen/ISO/Boot_media.iso,hdb:cdrom,r',
                'phy:/dev/xenvms/restore_disk,xvda,w'

              ]

boot = "dc"

#  Hostname
name        = 'system_restore'

#  Networking
vif         = [ 'mac=00:11:22:33:44:55,bridge=xenbr0' ]

vnc=1
vncconsole=1
vncpasswd='password'

vncunused = 1
vnclisten = '192.168.1.1'

stdvga = 0
serial = 'pty'
usbdevice = 'tablet' # Required for USB mouse


##  Behaviour
on_shutdown = 'destroy'
on_poweroff = 'destroy'
on_reboot   = 'restart'
on_crash    = 'restart'

vim /etc/default/grub

GRUB_DEFAULT=saved

update-grub

grub-set-default 2

reboot

Źródło: https://studysection.com/blog/how-to-change-boot-order-in-ubuntu-18-04-from-grub2-to-set-windows-as-default-launch/

1. Hardware check

egrep -c '(vmx|svm)' /proc/cpuinfo
grep -E --color '(vmx|svm)' /proc/cpuinfo

2. Install packages

sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virtinst libvirt-daemon virt-manager -y

3. Check libvirt status

sudo systemctl status libvirtd.service

4. Add user to libvirt and libvirt-qemu group

adduser user1 libvirt
adduser user1 libvirt-qemu

newgrp libvirt
newgrp libvirt-qemu

5. Create bridged network card

vim /etc/network/interfaces

iface enp6s0 inet manual
auto br0
iface br0 inet manual
bridge_ports enp6s0

https://www.linuxtechi.com/install-configure-kvm-debian-10-buster/

https://www.cyberciti.biz/faq/install-kvm-server-debian-linux-9-headless-server/

https://pl.euro-linux.com/blog/wirtualizacja-bez-kompromisow-kilka-slow-o-kvm-qemu-libvirt-i-virt-manager/

bez wpisywania hasła wiele razy

https://askubuntu.com/questions/780862/virt-manager-to-remote-host-continuous-password-prompt-over-ssh

sudo apt-get install haveged -y
sudo apt-get install openjdk-8-jre-headless -y
echo 'deb http://www.ui.com/downloads/unifi/debian stable ubiquiti' | sudo tee /etc/apt/sources.list.d/100-ubnt-unifi.list
sudo wget -O /etc/apt/trusted.gpg.d/unifi-repo.gpg https://dl.ubnt.com/unifi/unifi-repo.gpg
sudo apt-get update && sudo apt-get install unifi -y

https://localhost:8443 

https://www.youtube.com/watch?v=VH8b6ocohHU

[New Server]

apt-get install python-ldap libldap2-dev

mkdir /root/samba3

[Old Server]

/etc/init.d/samba stop

rsync -aP /var/lib/samba/private/secrets.tdb root@[new_server]:/root/samba3/
rsync -aP /var/lib/samba/wins.dat root@[new_server]:/root/samba3/
rsync -aP /var/lib/samba/winbindd_idmap.tdb root@[new_server]:/root/samba3/
rsync -aP /etc/samba/smb.conf root@[new_server]:/root/samba3/

[New Server]

vim /root/samba3/smb.conf

netbios name = [new_server]

Uwaga!! "Workgroup" w nowym i starym pliku smb.conf musi być taka sama.

samba-tool domain samba3upgrade --dbdir=/root/samba3/ --realm='''MYDOMAIN.COM''' /root/samba3/smb.conf

Po migracji:

vim /etc/samba/smb.conf

dns forwarder = 8.8.8.8
#       idmap_ldb:use rfc2307 = yes

vim /etc/nsswitch.conf

passwd:         files winbind
group:          files winbind

https://samba.tranquil.it/doc/en/samba_advanced_methods/samba_migrate_from_samba3_to_samba-ad.html

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