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Tue, May 17, 2016 8:27 am

gnome-screenshot

If you wish to take a screen shot on a Linux system, whether it is a CentOS, Ubuntu, or other Linux distribution, one tool that may already be on the system that will allow you to perform a screen capture from a command line interface, i.e., a shell prompt, is gnome-screenshot. You can determine if the utility is present on a system using the which command.
$ which gnome-screenshot
/usr/bin/gnome-screenshot

You can obtain help on using the tool to take a screenshot by typing gnome-screenshot at a shell prompt.

$ gnome-screenshot --help
Usage:
  gnome-screenshot [OPTION...] Take a picture of the screen

Help Options:
  -h, --help                     Show help options
  --help-all                     Show all help options
  --help-gtk                     Show GTK+ Options

Application Options:
  -c, --clipboard                Send the grab directly to the clipboard
  -w, --window                   Grab a window instead of the entire screen
  -a, --area                     Grab an area of the screen instead of the entire screen
  -b, --include-border           Include the window border with the screenshot
  -B, --remove-border            Remove the window border from the screenshot
  -d, --delay=seconds            Take screenshot after specified delay [in seconds]
  -e, --border-effect=effect     Effect to add to the border (shadow, border or none)
  -i, --interactive              Interactively set options
  --display=DISPLAY              X display to use

[ More Info]

[/os/unix/linux/utilities/graphics] permanent link

Sat, Jul 19, 2014 5:17 pm

Taking a screenshot with scrot

Scrot is a command line screen capturing application for Linux systems developed by Tom Gilbert. If the package is installed, you can type scrot imagefile to take a snapshot of the screen and store it in the file named imagefile, e.g., scrot test.png. If you don't want the terminal window from which you ran the command captured in the screenshot, you can issue the sleep command followed by some delay in seconds followed by a semicolon and then the scrot command to give you time to minimize the terminal window from which you ran the command. E.g.:
$ sleep 10; scrot test.png

The above command would give you 10 seconds to minimize the terminal window and any other open windows you didn't want to see in the screenshot. The results of the screenshot would be stored in the directory from which the command was run in the file test.png. Or you can use the scrot command's own delay parameter, -d or --delay followed by the number of seconds of delay you wish to give yourself before scrot captures the screen, e.g., scrot -d 10.

For help on the utility issue the command scrot --help.

scrot --help
Usage : scrot [OPTIONS]... [FILE]
  Where FILE is the target file for the screenshot.
  If FILE is not specified, a date-stamped file will be dropped in the
  current directory.
  See man scrot for more details
  -h, --help                display this help and exit
  -v, --version             output version information and exit
  -b, --border              When selecting a window, grab wm border too
  -c, --count               show a countdown before taking the shot
  -d, --delay NUM           wait NUM seconds before taking a shot
  -e, --exec APP            run APP on the resulting screenshot
  -q, --quality NUM         Image quality (1-100) high value means
                            high size, low compression. Default: 75.
                            For lossless compression formats, like png,
                            low quality means high compression.
  -m, --multidisp           For multiple heads, grab shot from each
                            and join them together.
  -s, --select              interactively choose a window or rectangle
                            with the mouse
  -u, --focused             use the currently focused window
  -t, --thumb NUM           generate thumbnail too. NUM is the percentage
                            of the original size for the thumbnail to be,
                            or the geometry in percent, e.g. 50x60 or 80x20.
  -z, --silent              Prevent beeping

  SPECIAL STRINGS
  Both the --exec and filename parameters can take format specifiers
  that are expanded by scrot when encountered.
  There are two types of format specifier. Characters preceded by a '%'
  are interpreted by strftime(2). See man strftime for examples.
  These options may be used to refer to the current date and time.
  The second kind are internal to scrot  and are prefixed by '$'
  The following specifiers are recognised:
                  $f image path/filename (ignored when used in the filename)
                  $m thumbnail path/filename
                  $n image name (ignored when used in the filename)
                  $s image size (bytes) (ignored when used in the filename)
                  $p image pixel size
                  $w image width
                  $h image height
                  $t image format
                  $$  prints a literal '$'
                  \n prints a newline (ignored when used in the filename)
  Example:
          scrot '%Y-%m-%d_$wx$h_scrot.png' -e 'mv $f ~/images/shots/'
          Creates a file called something like 2000-10-30_2560x1024_scrot.png
          and moves it to your images directory.

This program is free software see the file COPYING for licensing info.
Copyright Tom Gilbert 2000
Email bugs to <scrot_sucks@linuxbrit.co.uk>

You can also type man scrot to see information on use of the utility.

References:

  1. Scrot
    Wikipedia, the free encyclopedia
  2. The Tom Gilbert Blog

[/os/unix/linux/utilities/graphics] permanent link

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