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Simple bash debugger using trap DEBUG
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WSL fix using random private subnets
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Change TLS/SSL version and cypher parameters for Linux service using openssl library
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Systemd broken network.online target workaround
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Syncronize time by NTP before starting any services in Linux
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Letsencrypt: auto generate bundle certificates for Haproxy
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Using Ansible with bastion or jump host with variables
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Smooth deploy of a loaded PHP web application with php-fpm and nginx, without downtime or errors
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Removing all unnecessary bloatware from Xiaomi MIUI 11/12 (Android 9/10) without root
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APT repository signing key id for ansible
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Auto-mount sshfs protected by password with tcl expect
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Jinja 2 delete an item from dictionary inside a template
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Ansible snippet to update Elasticsearch cluster settings
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Parsing Naxsi messages in nginx error log with Logstash
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Zabbix: aggregate check for text items workaround
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Auto-resize screen in Virtualbox guest Linux system
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Encrypted local PKI CA for SSL/TLS keys and certificates with ansible vault
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VSCode: open ansible files with right syntax
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AWS SES and WorkMail for the same domain in different regions
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Persistent ipset for Ubuntu/Debian compatible with ufw and iptables-persistent
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Limit frequency of new connection attempts with iptables module recent
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Setup a SOCKS5 proxy in a single command
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Ubuntu based thin client made with your own hands
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Using Ansible dynamic AWS EC2 inventory with encrypted credentials in vault
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Using Ansible with bastion host
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Ansible: multi-line shell script inside playbook
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Systemd service that is always restarted
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Console autologin for Ubuntu with systemd(15.04 and higher)
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GRUB 2: password protection for all but default menu entries
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PCI DSS requirement for session idle timeout: implementation and bypass
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Add custom display resolution in LightDM
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Logstash: parse mysql slow log
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Ansible: properly copy local files within the target host
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Mikrotik and OpenVPN 2.3 compatibility: error 'Bad LZO decompression header byte: 69'
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Ansible: check before commit that all *.vault files are encrypted
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Rsyslog configuration: forwarding log files with file names, handle multi-line messages, no messages lost on server downtime, failover server
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Fix network hanging for WiFi card Realtek RTL8723BE on Linux kernel 4.4
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Ansible running multiple handlers subtelty
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Ansible: human readable git diff for vault encrypted files
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Fix 502 error on php-fpm service reload
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Change in PHP 7 that may break some of Ubuntu servers on update
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Building McAfee mysql audit plugin for Percona XtraDB Cluster 5.5 on Ubuntu 14.04.Trusty
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Zabbix: user parameter command non-zero exit code silently breaks triggers
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Make notify-send work from user cron file in ubuntu
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Perona XtraDB Cluster 5.5 work over IPv6
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Zabbix: unawailable items and hosts caused by wrong default timeout settings
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Redis replication: prevent split-brain (additional master) in case of network partition
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Ansible recursive ACLs: workaround for fast apply
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Running syslog-ng as unprivileged user
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Ansible: print role name inside template
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Restore SSH Agent connection when attaching to existing tmux or screen session
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Install jekyll and github-pages on Ubuntu 14.04 Trusty
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bash: manage background tasks and terminate them all on Ctrl+C