# Knowledge base ## Knowledge base - [Goal of knowledge base](https://knowledge.tracelog.in/master.md) - [Linux](https://knowledge.tracelog.in/linux-and-core/linux.md) - [Record SSH session for reporting](https://knowledge.tracelog.in/linux-and-core/linux/record-ssh-session-for-reporting.md) - [Compress / Decompress files](https://knowledge.tracelog.in/linux-and-core/linux/compress-decompress-files.md) - [Colorize logs](https://knowledge.tracelog.in/linux-and-core/linux/colorize-logs.md) - [Cron output & logging](https://knowledge.tracelog.in/linux-and-core/linux/cron-output-and-logging.md) - [Signal](https://knowledge.tracelog.in/linux-and-core/linux/signal.md): About system calls, SIGINT, SIGTERM, SIGKILL - [Break out and escape SSH session](https://knowledge.tracelog.in/linux-and-core/linux/break-out-and-escape-ssh-session.md) - [Mount volume permanently](https://knowledge.tracelog.in/linux-and-core/linux/mount-volume-permanently.md) - [Show processes most consuming CPU & MEM](https://knowledge.tracelog.in/linux-and-core/linux/show-processes-most-consuming-cpu-and-mem.md) - [Improve and optimize battery life on Linux](https://knowledge.tracelog.in/linux-and-core/linux/improve-and-optimize-battery-life-on-linux.md) - [File ownership & groups in linux](https://knowledge.tracelog.in/linux-and-core/linux/file-ownership-and-groups-in-linux.md) - [Automatic security update/patch on Ubuntu](https://knowledge.tracelog.in/linux-and-core/linux/automatic-security-update-patch-on-ubuntu.md) - [Clean buffers and cached on linux](https://knowledge.tracelog.in/linux-and-core/linux/clean-buffers-and-cached-on-linux.md) - [Bash completion on Linux/Mac](https://knowledge.tracelog.in/linux-and-core/linux/bash-completion-on-debian-9.md) - [Core services](https://knowledge.tracelog.in/linux-and-core/core-services.md) - [Nginx reload](https://knowledge.tracelog.in/linux-and-core/core-services/nginx-reload.md) - [OpenVPN Split tunneling](https://knowledge.tracelog.in/linux-and-core/core-services/openvpn-split-tunneling.md) - [Nmap commands](https://knowledge.tracelog.in/linux-and-core/core-services/nmap-commands.md) - [Hardware](https://knowledge.tracelog.in/linux-and-core/hardware.md) - [CPU Architecture fundamental](https://knowledge.tracelog.in/linux-and-core/hardware/cpu-architecture-fundamental.md) - [MySQL](https://knowledge.tracelog.in/database/mysql.md) - [InnoDB - innodb\_file\_per\_table parameter](https://knowledge.tracelog.in/database/mysql/innodb-innodb_file_per_table-parameter.md) - [MySQL - enable slow query log](https://knowledge.tracelog.in/database/mysql/mysql-enable-slow-query-log.md) - [MySQL - export large tables](https://knowledge.tracelog.in/database/mysql/mysql-export-large-tables.md) - [MongoDB](https://knowledge.tracelog.in/database/mongodb.md) - [Docker](https://knowledge.tracelog.in/container/docker.md) - [ADD or COPY in Dockerfile](https://knowledge.tracelog.in/container/docker/add-or-copy-in-dockerfile.md) - [Clean data of docker completely](https://knowledge.tracelog.in/container/docker/add-or-copy-in-dockerfile/clean-data-of-docker-completely.md) - [Podman](https://knowledge.tracelog.in/container/podman.md) - [Ansible](https://knowledge.tracelog.in/automation/ansible.md) - [Output format](https://knowledge.tracelog.in/automation/ansible/output-format.md) - [Jenkins](https://knowledge.tracelog.in/build-and-deployment/jenkins.md) - [Jenkins - force exit pipeline when failure](https://knowledge.tracelog.in/build-and-deployment/jenkins/jenkins-force-exit-pipeline-when-failure.md) - [PHP](https://knowledge.tracelog.in/language-and-toolset/php.md) - [Composer](https://knowledge.tracelog.in/language-and-toolset/php/composer.md) - [php-redis & php-igbinary](https://knowledge.tracelog.in/language-and-toolset/php/php-redis-and-php-igbinary.md) - [Technical based](https://knowledge.tracelog.in/mindset/technical-based.md) - [Writing well](https://knowledge.tracelog.in/mindset/technical-based/writing-well.md) - [Reinvent The Wheel](https://knowledge.tracelog.in/mindset/technical-based/reinvent-the-wheel.md) - [Approach a new system](https://knowledge.tracelog.in/mindset/technical-based/how-to-approach-a-new-system.md) - [Backup philosophy](https://knowledge.tracelog.in/mindset/technical-based/backup-philosophy.md) - [Mindset for building HA and scalable system](https://knowledge.tracelog.in/mindset/technical-based/mindset-for-building-ha-and-scalable-system.md) - [GitLab database incident](https://knowledge.tracelog.in/mindset/technical-based/gitlab-database-incident.md) - [Non-technical based](https://knowledge.tracelog.in/mindset/non-technical-based.md) - [How to read news efficiency?](https://knowledge.tracelog.in/mindset/non-technical-based/how-to-read-news-efficiency.md) - [How long should you nap?](https://knowledge.tracelog.in/mindset/non-technical-based/how-long-should-you-nap.md) - [Assume good faith](https://knowledge.tracelog.in/mindset/non-technical-based/assume-good-faith.md): https://en.wikipedia.org/wiki/Wikipedia:Assume\_good\_faith - [Books](https://knowledge.tracelog.in/reference-and-learning-source/books.md) - [Sysadmin/SRE](https://knowledge.tracelog.in/reference-and-learning-source/books/sysadmin-sre.md) - [Mindsets](https://knowledge.tracelog.in/reference-and-learning-source/books/mindsets.md) - [Software fundamentals](https://knowledge.tracelog.in/reference-and-learning-source/books/software-fundamentals.md) - [English](https://knowledge.tracelog.in/reference-and-learning-source/english.md) --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on a page URL with the `ask` query parameter: ``` GET https://knowledge.tracelog.in/master.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.