Install
# debian apt install msmtp msmtp-mta #
msmtp notes
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transmission notes
Issue: Transmission Remote GUI 403 Forbidden
Package: transmission-daemon Version: 2.94-2+deb10u1
find / -mount -type f -name settings.json -exec ls -l {} \;
-rw------- 1 root root 2186 Sep 20 22:29 /root/.config/transmission-daemon/settings.json
-rw-rw---- 1 debian-transmission debian-transmission 2398 Oct 30 16:37 /etc/transmission-daemon/settings.json
-rw------- 1 debian-transmission debian-transmission 2226 Oct 30 16:45 /home/debian-transmission/.config/transmission-daemon/settings.json
certbot notes
Issue: Unable to recover files from /var/lib/letsencrypt/temp_checkpoint
# certbot 1.7.0, CentOS 7 certbot --nginx -d site.domain.com # echo Saving debug log to /var/log/letsencrypt/letsencrypt.log Unable to recover files from /var/lib/letsencrypt/temp_checkpoint Incomplete or failed recovery for /var/lib/letsencrypt/temp_checkpoint Unable to revert temporary config
I did. Solved:
yum update mv /var/lib/letsencrypt /var/lib/letsencrypt.original
viber linux desktop increase font size
sed -i 's|^Exec=.*$|Exec=bash -c "QT_SCALE_FACTOR=1.5 /opt/viber/Viber" %u|g' /usr/share/applications/viber.desktop
pillar for pseudo random hour value in cron
The value will not be random. Value will be generated from static server data, and will be in some range using python function.
For range [0..2]:
( N % 3 )
Monitoring Bad Practices
salt notes
# master configuration dump salt --config-dump
auditd and cagefs
uname -r Linux 2.6.32-673.26.1.lve1.4.29.el6.x86_64
auditctl -l -w /home/ -p w -k rule_home222222222222222
Nextcloud notes
Move server to other host
- Install Nextcloud on the new server
- Set the old and new server to maintenance mode
- Dump the database on the old
- Copy the complete data directory to the new server
- Restore the database on the new server
- Edit the config.php on the new server. I think you have to copy passwordsalt a d secret from the old to the new server.
- Change the DNS record to point at your new server.
- Turn off maintenance mode on the new server.
Asterisk stop log to syslog
Issue
Asterisk put logs to /var/log/syslog
Affected OS: Ubuntu
Solution:
# Step1: create file for rsyslog
cat << EOF > /etc/rsyslog.d/10-asterisk.conf
if $programname == "asterisk" then {
stop
}
EOF
# Step2:
service restart rsyslog
jinja create file from template without empty lines
Issue
Creation of file from pillar simple list with Jinja template will be create empty line, in top or bottom of file, dependence for template syntax.
You can not create file without empty lines.
#!/usr/bin/python
from jinja2 import Template
d = {'testlist':['item1','item2','item3']}
tmpl = '''{%- for item in testlist %}
{{ item }}
{%- endfor %}'''
t = Template(tmpl)
print( t.render( d ) )
jinja set dictionary variable
Host name pattern
{host-id}[.dev].{dc-id}.{domain}
Host name examples
h01.kyiv01.domain.com h01.lon1.domain.com vs02.lon2.domain.com vs02.dev.lon1.domain.com h01.ny01.domain.com
salt class with jinja for timezone definition
Virtualbox on linux Troubleshooting
The vboxdrv kernel module is not loaded.
Symptoms:
$ VBoxManage --version
WARNING: The vboxdrv kernel module is not loaded. Either there is no module
available for the current kernel (5.4.28-1-MANJARO) or it failed to
load. Please recompile the kernel module and install it by
sudo /sbin/vboxconfig
You will not be able to start VMs until this problem is fixed.
using map.jinja in salt states
Description from vendor https://docs.saltstack.com/en/latest/topics/best_practices.html
My opinion: NEVER USE
Reason 1
It is not possible to see the values from this map on node or salt-master by any command, like:
pillar.get pillar.items
Reason 2
State will applied to the minion, even when node (or/and any parent class) has no any pillar data to this state.
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kubernetes notes
# docker info | grep -i cgroup # kubectl get nodes kubectl get pods -n kube-system -o wide # kubectl get events --namespace=kube-system # kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml # kubeadm token create --print-join-command # kubectl get ingress -A kubectl get componentstatuses
firewalld notes
firewall-cmd --list-all # add services firewall-cmd --add-service=zabbix-agent --permanent firewall-cmd --reload # add ports firewall-cmd --permanent --add-port=100/tcp firewall-cmd --reload
install xfce4-hardware-monitor-plugin
xfce4-hardware-monitor-plugin has been removed from relevant packages.
It’s so bad.
This is the best plugin for hardware monitoring! Thank you, OmegaPhil!
Will install it manually.
Vendor Git: https://git.xfce.org/archive/xfce4-hardware-monitor-plugin/
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Asterisk test connection to AMI by telnet
AMI is enabled in asterisk manager.conf
[general] enabled = yes port = 5038 bindaddr = 127.0.0.1 [admin] secret = secret --- skipped ---
wdm php email class send to gmail
, 'smpt' => [
'SMTP.HOST' => 'ssl://smtp.gmail.com'
, 'SMTP.PORT' => '465'
, 'SMTP.USERNAME' => '{[email protected]}'
, 'SMTP.PASSWORD' => 'PASSWORD'
, 'SMTP.FROM' => '{APP_NAME}'
, 'SMTP.SENDERHOST' => '{YOUR_HOST}'
, 'SMTP.DEBUG' => false // as you wish
]
Asterisk monast
Monast https://github.com/dagmoller/monast.git
Іssue: monast.py lost connection to asterisk each 3-4 seconds, and make reconnection
Debian 7
Asterisk 13.5
Tested git commits
* a02a81b 2012-06-19 | added option to set custom peer status using UserEvent [Diego Aguirre]
DONT WORK - Lost connection to server each 3-4 seconds.
* 777df26 2012-04-24 | changes [Diego Aguirre]
WORK
Selected version bbce290 2018-01-23
Commented lines in monast.py:
server.pushTask(server.ami.command, "database show") \
.addCallbacks(onCustomPeerStatus, self._onAmiCommandFailure, errbackArgs = (servername, "Error Requesting Custom Peer Status from ASTDB"))
Now connection to asterisk not lost.
Reason on issue: too much records in database, long time of executing request ‘database show’.
$ asterisk -rx 'database deltree q-answered' 156568 database entries removed.
FTP client iptables nf_conntrack_ftp
Symptoms
OS: Cloudlinux 6,7
ftp ftpserver.domain.com Connected to ftpserver.domain.com (11.22.33.44). 220----------------------------------------------- 220 This is a private system - No anonymous login Name (ftpserver.domain.com:root): ftpuser 331 User ftpuser OK. Password required Password: 230 OK. Current directory is /files Remote system type is UNIX. Using binary mode to transfer files. ftp> ls 227 Entering Passive Mode (11.22.33.44,19,73) ftp: connect: Connection timed out
IIT installation and usage
Mozilla Firefox Plugin:
https://eu.iit.com.ua/download/productfiles/[email protected]
Linux Arch package:
https://aur.archlinux.org/packages/eusw
Download:
https://iit.com.ua/download/productfiles/euswi.64.deb
debtap euswi.64.deb
cPanel whmapi
Размер занятый активными акаунтами
$ whmapi1 listaccts api.filter.enable=1 api.filter.a.field='suspended' api.filter.a.arg0='0' api.filter.a.type=eq | grep -E 'user:| diskused:' | tr '\n' ' ' | sed 's/diskused:/\n/g' | tail -n +2 | awk 'begin {}; {sum+=$1; printf("%s %s\n",$3,$1)} END {print sum}'
WordPress тормозит
Заказчик: сайт WordPress тормозит.
Сервер физический: сервер CPU 8 ядер, 16 GB RAM, Soft RAID 10
Размер дампа БД: 140 MB
Размер сайт на диске: 2.1G (c кэшем WP)
Время формирования страницы: от 15 секунд.
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Asterisk CDR setup
cdr_adaptive_odbc
Debian 9 Stretch
Asterisk 13.14.1 from debian repo.
MariaDB 10.3.7 from MariaaDB repo.
apt install unixodbc unixodbc-dev
/etc/odbcinst.ini
[mariadb] Description=MariaDB Connector/ODBC v.2.0 Driver=/usr/lib/x86_64-linux-gnu/odbc/libmaodbc.so Setup=/usr/lib/x86_64-linux-gnu/odbc/libodbcmyS.so FileUsage=1 UsageCount=2
zabbix jabber notification
Send script: /etc/zabbix/scripts/sendjabber.py
#!/usr/bin/env python import xmpp,sys xmpp_jid = '[email protected]' xmpp_pwd = 'password' to = sys.argv[1] msg = sys.argv[2] jid = xmpp.protocol.JID(xmpp_jid) client = xmpp.Client(jid.getDomain(),debug=[]) client.connect() client.auth(jid.getNode(),str(xmpp_pwd),resource='zabbix') client.send(xmpp.protocol.Message(to,msg)) client.disconnect()
ejabber notes
# reset admin password: $ ejabberdctl change_password admin hostname new_password
DNS:
SRV _xmpp-client._tcp.jabber. SRV 1 1 5222 jabber.domain.com. TTL
OpenCart do not show images | CageFS
There is site on Hosting with CageFS on CloudLinux (https://docs.cloudlinux.com/index.html?cagefs.html)
OpenCart (v.??)
Problem: don’t show images anywhere: main page, catalog (allproduct) page.
Tag src of image is empty.
No error or warning about it in php_error.log
Site place on filesystem: /home7/nickname/public_html/
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Veeam Linux agent install
Debian 9
wget http://repository.veeam.com/backup/linux/agent/dpkg/debian/x86_64/pool/veeam/v/veeam-release-deb/veeam-release-deb_1.0.1_amd64.deb apt install ./veeam-release-deb_1.0.1_amd64.deb
Asterisk | Save queue log in MySQL database
Check for existing ODBC MySQL DSN
asterisk*CLI> odbc show
ODBC DSN Settings
-----------------
Name: asterisk
DSN: asteriskcdr-odbc
Last connection attempt: 2019-12-21 11:42:30
Number of active connections: 1 (out of 1)
Add to /etc/asterisk/extconfig.conf
[settings]
; queue_log => odbc,{DSN-NAME},{TableName}
queue_log => odbc,asterisk,queue_log_test