Useful Linux e-books and further reading for Linux users Guide to the Linux command line: http://www.securitronlinux.com/lc/Linux-Command-Line-Guide%20.png. Useful guide to the Linux command line for Linux newcomers. Guide to Linux permissions. How to set the permissions for Linux files with the command line: http://www.securitronlinux.com/lc/112_sysadmin_permissions.pdf. Debian Linux handbook. Useful information and tips for Linux newcomers: http://www.securitronlinux.com/lc/debian-handbook.pdf. Ubuntu …