yolleksandr

haproxy.cnf

        acl acl_oauth_path path_beg /oauth
        acl acl_4xx_status status 400 401 403
        acl acl_5xx_status status 500 501 502 503 504 505 506 507 508 509 510 511 598 599

        http-request track-sc0 src table oauth_4xx_table if acl_oauth_path
        http-request track-sc1 src table oauth_5xx_table if acl_oauth_path

        http-response sc-inc-gpc0(0) if acl_4xx_status

yolleksandr

iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X

yolleksandr

certbot certonly -d *.domain.com -m hostmaster@domain.com --server https://acme-v02.api.letsencrypt.org/directory --manual

yolleksandr

https://wiki.mikrotik.com/wiki/Manual:Scripting
https://wiki.mikrotik.com/wiki/Manual:Scripting-examples#Detect_new_log_entry

Prepare
1. Create bot via botfather and get token
2. Add bot to chat
3. Get chat id

On device

yolleksandr

wget https://repo.percona.com/apt/percona-release_latest.$(lsb_release -sc)_all.deb
sudo dpkg -i percona-release_latest.$(lsb_release -sc)_all.deb
sudo apt-get update
sudo apt-get install percona-xtrabackup-24

yolleksandr

Enable millisecond resolution for java log4j for all .xml files with backup: 
find . -name "*xml" -print0 | xargs -0 sed -i.no_milliseconds 's/:ss/:ss\.SSS/g'

yolleksandr

elasticsearch — FORBIDDEN/12/index read-only / allow delete (api)

PUT qa-gidra-filebeat-2019.03.21/_settings
{
  "index": {
  "blocks": {
  "read_only_allow_delete": "false"
}
}
}

yolleksandr

https://docs.datastax.com/en/cassandra/3.0/cassandra/operations/opsReplaceNode.html

nodetool removenode ID

delete from snitch
restart live nodes
delete data dir on false node
enable bootstrap
start

yolleksandr

openssl pkcs12 -info -in keyStore.p12

yolleksandr

ALTER TABLE tablename MODIFY columnname VARCHAR(20) ;