install Canon B210 on Linux

Sep 5, 2023 • linux, cups

download Xerox B210 Linux PrintDriver Utilities, unpack it

then

/usr/sbin/lpadmin -p Xerox_B210  -E -v parallel:/dev/usb/lp0 -P /usr/local/src/Xerox_B210_Linux_PrintDriver_Utilities/uld/noarch/share/ppd/Xerox_B210_Series.ppd
/usr/sbin/lpadmin -p Xerox_B210 -o PageSize=A4

grow raid10 volume adaptec, new drives

Sep 4, 2023 • linux, raid

first, backup data and then remove existsing volume

arcconf getconfig 2
arcconf DELETE 2 LOGICALDRIVE 2

replace physical drives, then init drives, create volume

arcconf getconfig 2  | grep -A12 -B5 -Ei '(0\,26|0\,27|0\,28|0\,29)'
arcconf TASK START 2 DEVICE 0 26 initialize
arcconf TASK START 2 DEVICE 0 27 initialize
arcconf TASK START 2 DEVICE 0 28 initialize
arcconf TASK START 2 DEVICE 0 29 initialize
arcconf CREATE 2 LOGICALDRIVE name VOL-R10  MAX 10 0 26 0 27 0 28 0 29

build python from sources

Sep 3, 2023 • linux, python

A list of available Python versions can be found on python.org.

export PYTHON_VERSION=3.11.5
export PYTHON_MAJOR=3

prepare to build

curl -O https://www.python.org/ftp/python/${PYTHON_VERSION}/Python-${PYTHON_VERSION}.tgz
tar -xvzf Python-${PYTHON_VERSION}.tgz
cd Python-${PYTHON_VERSION}

build

./configure --enable-optimizations --with-lto=full --prefix=/opt/python/${PYTHON_VERSION} --libdir=/opt/python/${PYTHON_VERSION}/lib
make
sudo make install

make changes to /etc/profile.d/python.sh

# add python startup script for interactive sessions
export PYTHONSTARTUP=/etc/pythonstart
PATH=/opt/python/3.11.5/bin/:$PATH

set alternatives

update-alternatives --install /usr/bin/python3 python3 /opt/python/3.11.5/bin/python3.11 1
update-alternatives --config python3

sqlite database for postfix and dovecot

Sep 3, 2023 • linux, postfix, dovecot

init.sql

CREATE TABLE IF NOT EXISTS `virtual_aliases` (
  `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE, 
  `domain_id` int(11) NOT NULL,
  `source` varchar(100) NOT NULL,
  `destination` varchar(100) NOT NULL,
  FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
);
CREATE TABLE IF NOT EXISTS `virtual_domains` (
  `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,
  `name` varchar(50) NOT NULL
);
CREATE TABLE IF NOT EXISTS `virtual_users` (
  `id` INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE, 
  `domain_id` int(11) NOT NULL,
  `password` varchar(106) NOT NULL,
  `email` varchar(100) NOT NULL,
  FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE,
  UNIQUE (domain_id,email) ON CONFLICT REPLACE
);

mailbox.sh

#!/bin/bash
regex="^[a-z0-9!#\$%&'*+/=?^_\`{|}~-]+(\.[a-z0-9!#$%&'*+/=?^_\`{|}~-]+)*@([a-z0-9]([a-z0-9-]*[a-z0-9])?\.)+[a-z0-9]([a-z0-9-]*[a-z0-9])?\$"
sqlitedb="/etc/postfix/mail.db"
initdb() {
    sqlite3 $sqlitedb < /usr/local/sys/mail/init.sql
}
initdb
mailbox_add() {
if [ -z "$1" ] ; then
    echo "no mailbox set"
    return
fi
if [ -z "$2" ] ; then
    echo "no password set"
    return
fi
if ! [[ $1 =~ $regex ]] ; then
    echo "bad email"
    return
fi
domain=$(echo $1 | cut -f2 -d@)
domain_id=$(sqlite3 $sqlitedb "select id from virtual_domains where name=\"$domain\"")
if  [ "$domain_id" = "" ];then
    sqlite3 $sqlitedb "insert into virtual_domains (name) values (\"$domain\")"
        domain_id=$(sqlite3 $sqlitedb "select id from virtual_domains where name=\"$domain\"")
fi
password=`doveadm pw -s SHA512-CRYPT -p $2  | cut -b15-`
echo  $password
sqlite3 $sqlitedb "insert into virtual_users(domain_id,email,password) values ($domain_id,\"$1\",\"$password\")"
}
mailbox_del() {
echo $1 
}
mailbox_modify() {
echo $1 
# not implemented, add delete from
}
case "$1" in
  "a")
          mailbox_add $2 $3
  ;;
  "d")
          mailbox_del $2
  ;;
  "m")
          mailbox_modify $2
  ;;
  *)
      echo "param 1 must be one of a(add) d(delete) m (modify)"
      exit 1
  ;;
esac
chown vmail:vmail $sqlitedb

firewall whitelist

Sep 3, 2023 • linux, firewall

#!/bin/bash
# delete rules (if exists)
for num in `iptables -L INPUT -n -v --line-numbers | grep whitelist | awk '{print $1}' | sort -nr`  ; do iptables  -D INPUT  $num ;  done
#exit 0
# delete whitelist list
ipset -X whitelist
# create new whitelist
ipset -N whitelist nethash
# download network list
wget -O whitelist http://www.ipdeny.com/ipblocks/data/countries/{ru,ua,kz,by,uz,md,kg,de,am,az,ge,ee,tj,lv}.zone
echo  'create whitelist ipset'
list=$(cat /usr/local/sys/whitelist)
net_count=$(cat /usr/local/sys/whitelist | wc -l)
i=0
BAR='####################' 
#exit 0
for ipnet in $list
 do
 ipset -A whitelist $ipnet
 i=$(($i+1))
 echo -ne "\r$((100*$i/$net_count))% ${BAR:0:$((20*$i/$net_count))}"
 done
echo -ne "\ndone create whitelist\n"
# drop all from non exUSSR countrys
iptables -I  INPUT 1 -i ens3 -m set ! --match-set whitelist src -p tcp --dport 22 -j DROP
iptables -I  INPUT 1 -i ens3 -m set ! --match-set whitelist src -p tcp --dport 80   -j DROP

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