Linux clock drift breaks TLS, logs, and distributed systems
When checking synchronization, source, offset, and leap state, speed comes from ordering the investigation—not from typing more commands.
High context switches on Linux: when concurrency becomes overhead
The search intent behind this problem is attributing scheduler churn to threads, locks, and wakeups.
Linux CPU steal time: your VM is waiting on the hypervisor
When distinguishing guest load from host contention, speed comes from ordering the investigation—not from typing more commands.
Linux cgroup CPU throttling: high latency below 100% CPU
The search intent behind this problem is detecting quota exhaustion in containers and services.
Deleted files still consuming disk: find open descriptors
The search intent behind this problem is reclaiming space without truncating the wrong process.
Read iostat like an operator: await, queue, and utilization
The search intent behind this problem is diagnosing storage without one magic threshold.
Linux file descriptor leak: sockets, files, and limits
The search intent behind this problem is proving descriptor growth and the responsible type.
Disk has free space but writes fail: inode exhaustion
The search intent behind this problem is finding filesystems with no allocatable file records.
High I/O wait on Linux: latency, queue, or idle CPU?
The search intent behind this problem is interpreting wa without blaming the disk too early.
Linux kernel log triage: hardware, filesystem, OOM, and network
The search intent behind this problem is separating actionable new events from old boot noise.
High load average with low CPU usage
The search intent behind this problem is finding uninterruptible I/O, runnable queues, and blocked tasks.
Linux free vs available memory: stop fearing the page cache
The search intent behind this problem is deciding whether memory pressure is real.
Linux packet drops: interface, kernel, socket, or application
The search intent behind this problem is locating where packets disappear.
Linux OOM killer analysis: read the victim selection
The search intent behind this problem is understanding host exhaustion before adding memory.
Linux performance debugging: the first 10 minutes
The search intent behind this problem is identifying CPU, memory, storage, network, or lock pressure.
Linux process stuck in D state: why kill -9 does not work
When tracing a task waiting inside the kernel, speed comes from ordering the investigation—not from typing more commands.
Linux PSI: detect CPU, memory, and I/O contention
When using stall time to quantify resource pressure, speed comes from ordering the investigation—not from typing more commands.
Linux swap is used but memory is available: is that bad?
The search intent behind this problem is interpreting cold-page eviction and active swap pressure.
systemd start request repeated too quickly
The search intent behind this problem is diagnosing the crash loop behind StartLimitHit.
Zombie processes on Linux: what they consume and who must reap them
The search intent behind this problem is finding the parent that failed to collect exit status.