To see a list of potential command line parameters for the echo command use the man-pages as follows, Note, to exit the man page press q to quit. Other command line parameters are strings. Some command line parameters are filenames. In most cases switches start with a dash ‘-‘. Some command line parameters are switches. The following is a demonstration of file permissions using several Linux commands.įirst some background on commands and programs.

Directories and scripts would have this set appropriately for each user group. For example ‘w’ is write permission for that file and ‘r’ is read permission. The letters represent specific file permissions. Files accessible on a webserver would use ‘other’ with file permissions set accordingly. Users can be in a group with file permissions set accordingly.

The first set of three are permissions for the user (the owner of the file). The next sets of characters are in three sets of three. The directory googleSheets has the letter “d” as the first character. An ‘l’ (L) would indicate a symbolic link. The dash ‘-‘ indicates a regular file, the ‘d’ is for directory. On the fare left are the permissions for these files. Also in blue is a directory named googleSheets. This includes two script, helloWorld.py and helloWorld.sh. The path and permissions graphic is an example of the “ls -l” command (directory long listing). Make the computer work for you not the other way around. The RPi comes with a pre-installed user named ‘pi’.ĭo you want to be the master or the servant? To access the command line ssh into your RPi or if you are in through VNC open a terminal by pressing (at the same time) Ctr-Alt-t, (t is for terminal).Ībove is the typical command prompt for a Linux terminal. It is a server if VNC and/or ssh are running. Raspbian is both a desktop computer with a GUI and potentially a server. Linux command specific to the Raspberry Piīasics of the Linux command line on the RPi.Basics of the Linux command line on the RPi.

Edit text file in terminal raspberry pi