I would like to use the following command:
$ gnome-screenshot -caf=<file name>
How can I pass something auto-generated like
Screenshot from 2017-12-07 20-22-56.png for
You can use the
date command for the task of including the actual date and time into the filename. Let's see what we can find in the
date man page:
The following operands shall be supported: +format When the format is specified, each conversion specifier shall be replaced in the standard output by its corresponding value. All other characters shall be copied to the output without change. The output shall always be terminated with a <newline>.
Conversion Specifications %a Locale's abbreviated weekday name.
%A Locale's full weekday name. %b Locale's abbreviated month name. %B Locale's full month name. %c Locale's appropriate date and time representation. %C Century (a year divided by 100 and truncated to an integer) as a decimal number [00,99]. %d Day of the month as a decimal number [01,31]. %D Date in the format mm/dd/yy. %e Day of the month as a decimal number [1,31] in a two- digit field with leading <space> character fill. %h A synonym for %b. %H Hour (24-hour clock) as a decimal number [00,23]. %I Hour (12-hour clock) as a decimal number [01,12]. %j Day of the year as a decimal number [001,366]. %m Month as a decimal number [01,12]. %M Minute as a decimal number [00,59]. %n A <newline>. %p Locale's equivalent of either AM or PM. %r 12-hour clock time [01,12] using the AM/PM notation; in the POSIX locale, this shall be equivalent to %I:%M:%S %p. %S Seconds as a decimal number [00,60]. %t A <tab>. %T 24-hour clock time [00,23] in the format HH:MM:SS. %u Weekday as a decimal number [1,7] (1=Monday). %U Week of the year (Sunday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Sunday shall be considered to be in week 0. %V Week of the year (Monday as the first day of the week) as a decimal number [01,53]. If the week containing January 1 has four or more days in the new year, then it shall be considered week 1; otherwise, it shall be the last week of the previous year, and the next week shall be week 1. %w Weekday as a decimal number [0,6] (0=Sunday). %W Week of the year (Monday as the first day of the week) as a decimal number [00,53]. All days in a new year preceding the first Monday shall be considered to be in week 0. %x Locale's appropriate date representation. %X Locale's appropriate time representation. %y Year within century [00,99]. %Y Year with century as a decimal number. %Z Timezone name, or no characters if no timezone is determinable. %% A <percent-sign> character. See the Base Definitions volume of POSIX.1‐2008, Section 7.3.5, LC_TIME for the conversion specifier values in the POSIX locale.
date can not have spaces formatted into its output you would have to use two date commands as shown below, first for the date you can use
+\%Y.\%m.\%d as a parameter which will result in a date format like
2017.12.07 and for the time you can use
+\%H:\%M:\%S which will result in a format like
The clipboard option (
-c) does not work together with the save as filename option (
gnome-screenshot, so you have to choose either one. This command will do it (just edit the
c back in if you need the clipboard, but then let the
f and the filename out, both wont work together):
gnome-screenshot -af "Screenshot from $(date +\%Y.\%m.\%d) $(date +\%H:\%M:\%S).png"
It generates a file name like the following (just with the actual date and time you call this command at):
Screenshot from 2017.12.07 20:37:18.png
This will however store the file inside the directory you are currently in, to add a path like
~/Pictures you need to provide a full path since
~ does not get expanded inside the quotes. The following would save the files for example in your pictures folder:
gnome-screenshot -af "/home/$USER/Pictures/Screenshot from $(date +\%Y.\%m.\%d) $(date +\%H:\%M:\%S).png"
Or you get rid of the quotes which then would mean you can use the tilde (
~) but then you have to escape all spaces in the name:
gnome-screenshot -af ~/Pictures/Screenshot\ from\ $(date +\%Y.\%m.\%d)\ $(date +\%H:\%M:\%S).png