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  • Airplane mode

    serch.it?q=Airplane-mode

    Nexus 5; Android 4.4.2, in airplane modeAirplane mode, aeroplane mode, flight mode, offline mode, or standalone mode is a setting available on smartphones and other portable computers that, when activated, suspends radio-frequency signal transmission by the device, thereby disabling Bluetooth, telephony, and Wi-Fi. GPS may or may not be disabled, because it does not involve transmitting radio waves. The name comes from the prohibition by most of the airlines of using equipment transmitting radio-frequency signal while in flight; using airplane mode prevents devices from transmitting. When the "aeroplane mode" is activated, it disables all voice, text, telephone, and other signal-transmitting technologies such as Wi-Fi and Bluetooth. Wi-Fi and Bluetooth can be enabled separately even while the device is in airplane mode; this is acceptable on some aircraft. Receiving radio-frequency signals, as by radio receivers and satellite navigation services, is not inhibited. However, even receiving telephone calls and messages without responding would require the phone to transmit.

  • Single user mode

    serch.it?q=Single-user-mode

    Single user mode is a mode in which a multiuser computer operating system boots into a single superuser. It is mainly used for maintenance of multi-user environments such as network servers. Some tasks may require exclusive access to shared resources, for example running fsck on a network share. This mode can also be used for security purposes - network services are not run, eliminating the possibility of outside interference. On some systems a lost superuser password can be changed by switching to single user mode, but not asking for the password in such circumstances is viewed as a security vulnerability. 1. Unix family -------------- Unix-like operating systems provide single user mode functionality either through the System V-style runlevels, BSD-style boot-loader options, or other boot-time options. The runlevel is usually changed using the init command, runlevel 1 or S will boot into single user mode. Boot-loader options can be changed during startup before the execution of the kernel.

  • Safe mode

    serch.it?q=Safe-mode

    Safe mode is a diagnostic mode of a computer operating system (OS). It can also refer to a mode of operation by application software. In Windows, safe mode only allows essential system programs and services to start up at boot. Safe mode is intended to help fix most, if not all problems within an operating system. It is also widely used for removing rogue security software.

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