Sometimes my Ubuntu 16.04 LTS (i3 and 4GB RAM) system hangs so badly that I cannot copy paste text.
I normally have System Monitor open to monitor my usage, and when I check it I find that I have enough resources for hang-free usage.
What should I inspect? System Monitor seems unreliable? I have enough HDD free space.
Hard Drive specifications
sudo smartctl -a /dev/sda
smartctl 6.5 2016-01-24 r4214 [x86_64-linux-4.4.0-121-generic] (local build) Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org === START OF INFORMATION SECTION === Model Family: Western Digital Blue Mobile Device Model: NDC ND10JPVX-7SJC3T0 Serial Number: WXC1A17AD6CD LU NNN Device Id: 5 0014ee 607557602 Firmware Version: 02.01A02 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ACS-2 (minor revision not indicated) SATA Version is: SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s) Local Time is: Fri May 4 09:48:31 2018 IST SMART support is: Available - device has SMART capability. SMART support is: Enabled