Linux Disk Space Not Freed After Deleting Files? Find Open Deleted Files with lsof
You delete a 20 GB log file, run df -h, and expect instant relief. But the filesystem is still 98% full. You run du -sh /var/log, and it says the…
chronyc Sources Shows Reach 0? How to Fix Chrony Not Syncing in Linux
Your Linux server appears healthy, chronyd is running, and the NTP servers are listed correctly. But one detail in the output refuses to improve: MS Name/IP address Stratum Poll Reach…
ulimit Not Changing for systemd Service? How to Set Correct Limits in Linux
You increase the open-file limit, restart your application, and expect the problem to disappear. Your shell reports: ulimit -n 65535 But the service still fails with: Too many open files…
No Usable Sandbox When Running Chrome or Chromium in Docker
You finally get your Docker image building. Puppeteer installs successfully. Chrome or Chromium is present. Your Node.js script starts. Then the container crashes with something like this: [ERROR:zygote_host_impl_linux.cc] No usable…