Linux File Descriptor Limits for High Concurrency Services
Socket, pipe, and file handles consume process descriptors, and exhaustion can look like application failure. Begin with requirements and the workload. Record...
Category
Linux/Bash
Bash Strict Mode Trade-Offs for Production Deployment Scripts
Errexit, nounset, and pipefail reveal some shell errors, yet conditional and pipeline semantics require explicit handling. An engineering decision begins with...
Linux Systemd Service Restart Policies and Backoff Design
Restart policies are useful for transient crashes but can hide permanent configuration defects in an expensive failure loop. An engineering decision begins...
Linux Cgroups Memory Limits and OOM Behavior for Containers
Direct answer: Cgroups account for memory use against configured limits. Production choices must account for a real workload, security boundaries and the...
Linux Systemd Watchdog vs Application Health Checks
Direct answer: A watchdog can detect when a service stops reporting liveness. Production choices must account for a real workload, security boundaries and the...
Linux Bash Shellcheck vs Runtime Testing for Production Scripts
Direct answer: Static shell analysis identifies quoting and portability risks. Production choices must account for a real workload, security boundaries and the...
Linux Cron vs systemd Timers for Scheduled Jobs
Quick answer: cron is simple and available everywhere, but it has a minimal environment, no built-in logging, and no catch-up for missed runs. Systemd timers...
Linux Signals and How Services Should Handle SIGTERM
Quick answer: SIGTERM is the polite request to terminate, and a service should catch it, stop accepting new work, finish or hand off what is in flight, and...
Linux Log Rotation Strategies for Long-Running Services
Quick answer: rotate logs by size or time, compress old files, and cap retention so disks never fill. With logrotate, prefer signaling the service to reopen...