Worked on the Consensys/linea-monorepo repository to enhance the security and stability of the Linea Mainnet by upgrading its Ethereum client. Focused on a targeted maintenance task, the developer updated the Geth client from version 1.13.15 to 1.16.5 using Docker Compose, specifically modifying the geth-init and geth-node services. This upgrade addressed critical security patches and enabled new features for the network, aligning with the ongoing maintenance cadence. The work involved hands-on use of DevOps practices, Docker, and YAML, resulting in a well-documented, single-change improvement that strengthened the mainnet’s operational resilience and kept dependencies current.