get age of given file
How can I get the age of a given file in, at least, days?
command-line
Why cat, grep and other commands can’t understand files starting with minus sign?
If I have a file which name starting with single or several minus sign, for example –1 it can’t be used as a parameter of many commands. Even if I run cat –1 instead of file content I get unrecognised option error message: cat: unrecognized option '–1' Same effect appears when I type cat "–1" … Read more
How do I find the window dimensions and position accurately including decorations?
I’ve been trying to figure out the size of a window for use in a small script. My current technique is using wmctrl -lG to find out the dimensions. However, the problem is this:
How can I display syntax highlighting on a file?
Is there a variant of cat that outputs syntax-highlighted lines of code when used on a source file?
What’s the best way to join files again after splitting them?
If I have a large file and need to split it into 100 megabyte chunks I will do
How to transform a text file into a picture
If I have a plain text file, how can I convert it to an image file through the command line? (and preserve the layout of the ASCII art in it)
Do we have an undo in Linux?
I renamed a few files in one batch script. Is there a way to undo the changes without having to rename them back?
How to pipe the list of commands displayed by of “tab complete”?
When using commands in bash I like the double tab option to display the available commands. Some commands have more possible matches than others:
What does the ./ mean (dot slash) in linux?
For example, I can do the following
What is the difference in usage between shell variables and environment variables?
I actually did not know there are two different types of variables I can access from the command line. All I knew is, that I can declare variables like: