• howto-use-tar-command-through-network-over ssh session

# SSH

## login to root with ssh key

#/etc/ssh/sshd_config
PermitRootLogin without-password
PubkeyAuthentication yes
service sshd restart

## check session ( specially for x )

ls /usr/bin/*session

## check x application

dpkg -l|egrep -i "(kde|gnome|lxde|xfce|mint|unity|fluxbox|openbox)" | grep -v library

## packages depends

apt-cache -o APT::Cache::GivenOnly=1 dotty gnome-system-tools | dot -T png > out.png

## find GUI applications

apt-cache rdepends  --installed libx11-6

## get large packages #wajig

sudo apt-get install wajig
wajig large

#Show Installed Package Size using dpkg-query

dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -n | tail -n 10

## get installed meta package ( to clear gui) awk 'BEGIN{

  FS=" - ";
  findmeta="apt-cache search . | grep -i \"metapackage\\|meta-package\"";
  while ((findmeta | getline) > 0)  meta[$1]=$2;

  FS=" ";
  findinstalled="dpkg --get-selections";
  while ((findinstalled | getline) > 0) {
      if ($1 in meta) print $1" - "meta[$1]
  }

}'

## clear fail2ban sqlite base

sqlite3 /var/lib/fail2ban/fail2ban.sqlite3 \
  "DELETE FROM bans WHERE DATE(timeofban, 'unixepoch') < '2021-08-19'; VACUUM;"

## full local backup to tmp

#brotli - slow

tar -cf - --exclude=/backup.tar.gz --exclude=/proc --exclude=/tmp --exclude=/mnt --exclude=/dev --exclude=/sys --exclude=/run --exclude=/media --exclude=/var/log --exclude=/var/cache/apt/archives  / | brotli |  pv | cat > /tmp/bot-ar-`date +%m-%d-%Y`.tar.bt

#gzip - fast ## tar gz → root /

tar -czvf - --one-file-system --ignore-failed-read  --exclude=/backup.tar.gz --exclude=/proc --exclude=/tmp --exclude=/mnt --exclude=/dev --exclude=/sys --exclude=/run --exclude=/media --exclude=/var/log --exclude=/var/cache/apt/archives --exclude=/var/lib/lxcfs / |   pv | cat > /tmp/bot-ar-`date +%m-%d-%Y`.tgz

## tar gz → /boot

tar -czvf - --one-file-system --ignore-failed-read   /boot |   pv | cat > /tmp/bot-ar-boot-`date +%m-%d-%Y`.tgz

## only if root available for login SSH

ssh [email protected] 'cd / && tar -cvf - --exclude=/backup.tar.gz --exclude=/proc --exclude=/tmp --exclude=/mnt --exclude=/dev --exclude=/sys --exclude=/run --exclude=/media --exclude=/var/log --exclude=/var/lib/lxcfs/ --exclude=/var/cache/apt/archives  / | gzip -9 ' |  pv | cat > /mnt/d/backup/bot-ar/bot-ar-`date +%m-%d-%Y`.tgz