How do I prepend the data from file1.txt to file2.txt?
The following command will take the two files and merge them into one
cat file1.txt file2.txt > file3.txt; mv file3.txt file2.txt
I have two files: file1 and file2. How do I append the contents of file2 to file1 so that contents of file1 persist the process?
I'm looking to recursively look through directories to find files NOT owned by a particular user and I am not sure how to write this.
Is there any method in Linux to calculate the number of files in a directory (that is, immediate children) in O(1) (independently of the number of files) without having to list the directory first? If not O(1), is there a …