Concepts
Articles of this type from all portals.
- Android version and security patch level AndroidHow to see which Android version and security patch your phone has, how to update, and why the patch date matters.
- App cache vs app data on Android AndroidThe difference between Clear cache and Clear storage (data) on Android, what each removes and when to use which.
- BitLocker recovery key WindowsWhat the BitLocker recovery key is, why Windows asks for it, where to find it and how to check protection with manage-bde.
- Freeing up storage on Android AndroidWhere Android storage goes, the built-in ways to free space, and what to check before deleting photos, downloads or apps.
- Inodes and 'No space left on device' LinuxWhat an inode is, how to see inode usage with df -i, and how to find directories with millions of small files.
- Load average LinuxWhat the three load average numbers mean, how they relate to CPU cores, and when a high load is a problem.
- OOM killer LinuxWhat the Linux out-of-memory killer does, how to find out which process it killed, and how to make it less likely.
- SSH keys LinuxHow SSH key authentication works, how to create a key with ssh-keygen, install it on a server and protect it.
- Swap space on Linux LinuxWhat swap is, how to see it with free and swapon, how to add a swap file, and what vm.swappiness changes.