Count open file descriptors system-wide

More linux commands

• IO wait and throughput
  iostat -xz 2 5copy

  Extended disk IO stats every 2s, 5 iterations; look for %iowait, await

• Virtual memory stats
  vmstat 1 5copy

  System-wide CPU, memory, swap, IO stats per second

• Watch IO per process
  iotop -aocopy

  Accumulated disk read/write per process (requires root)

• System activity report
  sar -u -r -d 1 5copy

  CPU, memory, and disk stats via sysstat (5 samples, 1s interval)

• Trace system calls of a process
  strace -f -e trace=network,file -p <pid>copy

  Trace network and file syscalls of a running process

all 133 linux commands →