In this article, we will share a number of Bash command-line shortcuts useful for any Linux user. Although this article will mostly benefit Linux beginners getting their way around with command line basics, those with intermediate skills and advanced users might also find it practically helpful. We will group the bash keyboard shortcuts according to categories as follows. In this article, we shared some common and useful Bash command-line shortcuts and operations. Use the comment form below to make any additions or ask questions. TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web.
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Have you ever accidentally suspended or stopped a process in your shell? An accidental hit to CTRL-z will suspend a program, returning a message like this:. The message above says that the process that was stopped is named "top". What it means is that the process still exists, but is in an suspended state where it is not actively doing anything. If you try to exit your shell session, you will get a message saying something like zsh: you have suspended jobs.
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During S3 resume, hardware needs to be reinitialized. For most devices, this is easy, and kernel driver knows how to do it. Those are usually initialized by BIOS, and kernel does not have enough information to boot video card. Kernel usually does not even contain video card driver — vesafb and vgacon are widely used. This is not problem for swsusp, because during swsusp resume, BIOS is run normally so video card is normally initialized.
Currently there are three methods of suspending available: suspend to RAM usually called just suspend , suspend to disk usually known as hibernate , and hybrid suspend sometimes aptly called suspend to both :. Using low level interfaces directly is significantly faster than using any high level interface, since running all the pre- and post-suspend hooks takes time, but hooks can properly set hardware clock, restore wireless etc. The most straightforward approach is to directly inform the in-kernel software suspend code swsusp to enter a suspended state; the exact method and state depends on the level of hardware support. See kernel documentation for details. The uswsusp 'Userspace Software Suspend' is a wrapper around the kernel's suspend-to-RAM mechanism, which performs some graphics adapter manipulations from userspace before suspending and after resuming.