Unix
An operating system.
Linux is an open-source project that is a variant of Unix.
Unix File System
https://www.openbookproject.net/tutorials/getdown/unix/lesson1.html
Home Directory
• Your home directory (folder) is where your stuff is stored
The home dir is:
• /Users/migod on MacOS
• /home/migod on my desktop Ubuntu Linux box
• /ux/migod on plg Ubuntu Linux server
Related
File Permissions Python
opening and closing The argument mode points to a string beginning with one of the following sequences (Additional characters may follow these sequences.):
r: Open text file for reading. The stream is positioned at the beginning of the file.r+: Open for reading and writing. The stream is positioned at the beginning of the file.w: Truncate file to zero length or create text file for writing. The stream is positioned at the beginning of the file.w+: Open for reading and writing. The file is created if it does not exist, otherwise it is truncated. The stream is positioned at the beginning of the file.a: Open for writing. The file is created if it does not exist. The stream is positioned at the end of the file. Subsequent writes to the file will always end up at the then current end of file, irrespective of any intervening fseek(3) or similar.a+: Open for reading and writing. The file is created if it does not exist. The stream is positioned at the end of the file. Subsequent writes to the file will always end up at the then current end of file, irrespective of any intervening fseek(3) or similar.
Sometimes, there is the b keyword, which on Windows appended opens the file in binary mode.
Good Summary from stackoverflow
