Mastering Command Line Tools in Linux
What happens when you execute the command named by the symbolic link /usr/local/cs/bin/emacs?
Which file is actually executed?
How do you easily invoke the Emacs yank function using keystrokes?
What does the yank function do?
What is the oldest regular file in the /usr/lib64 directory and how do you determine its age?
Specify the name of the file without the /usr/lib64 prefix. Don't ignore files starting with ".".
Answer:
When you execute the command named by the symbolic link /usr/local/cs/bin/emacs, the program /usr/local/cs/bin/emacs is actually executed. The symbolic link simply points to the location of the executable file that is run.
Answer:
The Emacs yank function copies text from the kill ring and inserts it into the buffer. You can easily invoke it by pressing "Ctrl + Y" on the keyboard.
Answer:
The oldest regular file in the /usr/lib64 directory is libutil-2.31.1.so. You can determine its age by looking at the last-modified time of the file.
Details:
When you execute a command through a symbolic link, the actual file being executed is the target file that the symbolic link points to. This allows for easy access to the executable by creating a shortcut reference to it.
The Emacs yank function is a useful feature that allows users to paste previously copied text into the current buffer. By pressing "Ctrl + Y", you can quickly insert text from the kill ring into your document in Emacs.
To determine the oldest regular file in a directory based on last-modified time, you need to look at the timestamp of each file. In this case, the file "libutil-2.31.1.so" is the oldest regular file in the /usr/lib64 directory based on its last-modified time.