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  2. Magic SysRq key - Wikipedia

    en.wikipedia.org/wiki/Magic_SysRq_key

    Reset the nice level of all high-priority and real-time tasks n: b: n: k: Shut off the system o: r: o: y: Output the current registers and flags to the console p: l: p; Display all active high-resolution timers and clock sources. q ' a: q: Switch the keyboard from raw mode, used by programs such as X11 and SVGAlib, to XLATE mode r: p: r: p ...

  3. Trim (computing) - Wikipedia

    en.wikipedia.org/wiki/Trim_(computing)

    Trimming enables the SSD to more efficiently handle garbage collection, which would otherwise slow future write operations to the involved blocks. [ 3 ] Although tools to "reset" some drives to a fresh state were already available before the introduction of trimming, they also delete all data on the drive, which makes them impractical to use ...

  4. Slow steaming - Wikipedia

    en.wikipedia.org/wiki/Slow_steaming

    Slow steaming is the practice of operating transoceanic cargo ships, especially container ships, at significantly less than their maximum speed. [1] In 2010, an analyst at the National Ports and Waterways Institute stated that nearly all global shipping lines were using slow steaming to save money on fuel.