What's New

Performance improvements. Updated content.

App Description

Best Seller UNIX/Linux Reference since 2010 for both students and working adults! Now, with updated content for 2021, Air Print and iOS Light and Dark modes.

#1 Guide in Operating Systems > Unix / Linux
#1 College OS Guide

Making First Steps (passwd, su)
Logging Out, Shell (exit, Ctrl-d)
Special Characters (Ctrl-c, Ctrl-h, Ctrl-d)
Metacharacters (?, *, [])
Environment (env)
How To Change Environment Variables (.profile, .login)
Navigating The File System (absolute, relative paths)
How To Use Paths I (pwd, cd)
How To Use Paths II (cd ..)
Files and Directories - Part I (ls, ls -l)
Files and Directories - Part II(ls -al)
Files and Directories - Part III (ls -R)
Permissions - Part I (id)
Permissions - Part II (rwx-)
Permissions - Part III (how to read)
Permissions - Part IV (chmod)
Viewing Files (more, cat, head, tail)
Searching in Files - Part I (grep options)
Searching in Files - Part II (grep examples)
Renaming Files (mv)
Copying Files (cp)
Deleting Files (rm)
Links (ln)
Compare Files (diff)
Compare Directories (dircmp)
Creating Directories (mkdir)
Finding Files and Directories (find)
Create and Edit Files With vi - Part I
Create and Edit Files With vi - Part II (insert mode)
Create and Edit Files With vi - Part III (searching)
Create and Edit Files With vi - Part IV (editing)
Create and Edit Files With vi - Part V (deleting)
Create and Edit Files With vi - Part VI (saving)
Create and Edit Files With vi - Part VII (line-edit mode)
Printing Files (lp, lpr)
Archiving Files (tar)
Transferring Files Between Computers (nslookup, ping)
Telnet
FTP - Part I (connecting)
FTP - Part II (transferring files)
More UNIX Commands (uname, arch)
Date and Time (date, cal)
Find Out About Other Users - Part I (who)
Find Out About Other Users - Part II (finger)
History
Disk Space (df, du, gzip, gunzip)
Memory (free, uptime)
Processes (Jobs) - Part I (ps)
Processes (Jobs) - Part II (ps -ef, kill, fuser)
Processes (Jobs) - Part III (at)
Electronic Mail - Part I (elm)
Electronic Mail - Part II (command mode)
Advanced UNIX - Redirection Part I (>, >>)
Advanced UNIX - Redirection Part II (|)
Practical sed and awk - Part I (sed)
Practical sed and awk - Part II (sed example)
Practical sed and awk - Part III (sed example)
Practical sed and awk - Part IV (awk)
Practical sed and awk - Part V (awk example)

The best way to learn UNIX and Linux for all.
Designed for all devices, full support for Air Print.

iPhone Screenshots

(click to enlarge)

Practical UNIX Linux screenshot 1 Practical UNIX Linux screenshot 2 Practical UNIX Linux screenshot 3 Practical UNIX Linux screenshot 4 Practical UNIX Linux screenshot 5 Practical UNIX Linux screenshot 6 Practical UNIX Linux screenshot 7

iPad Screenshots

(click to enlarge)

Practical UNIX Linux screenshot 8 Practical UNIX Linux screenshot 9 Practical UNIX Linux screenshot 10 Practical UNIX Linux screenshot 11 Practical UNIX Linux screenshot 12 Practical UNIX Linux screenshot 13 Practical UNIX Linux screenshot 14 Practical UNIX Linux screenshot 15 Practical UNIX Linux screenshot 16 Practical UNIX Linux screenshot 17

App Changes

  • June 24, 2011 New version 2011.1.1
  • July 16, 2011 Price decrease: $2.99 -> $0.99
  • August 08, 2011 Price increase: $0.99 -> $2.99
  • August 13, 2011 Price decrease: $2.99 -> $0.99
  • August 15, 2011 Price increase: $0.99 -> $2.99
  • August 17, 2011 Price decrease: $2.99 -> $1.99
  • September 01, 2011 Price decrease: $1.99 -> $0.99
  • September 06, 2011 Price increase: $0.99 -> $1.99
  • September 06, 2011 Price increase: $0.99 -> $1.99
  • September 17, 2011 Price decrease: $1.99 -> $0.99
  • September 19, 2011 Price increase: $0.99 -> $1.99
  • September 20, 2011 Price decrease: $1.99 -> $0.99
  • September 29, 2011 Price increase: $0.99 -> $1.99
  • December 20, 2011 New version 4.0
  • December 20, 2011 Price decrease: $1.99 -> $0.99
  • December 31, 2011 Price increase: $0.99 -> $1.99
  • September 12, 2013 New version 5
  • October 31, 2015 New version 6.0
  • December 26, 2015 Price decrease: $1.99 -> $0.99
  • January 03, 2016 Price increase: $0.99 -> $1.99
  • June 13, 2019 New version 9
  • June 13, 2019 Price increase: $1.99 -> $2.99
  • June 13, 2019 Price increase: $1.99 -> $2.99
  • June 14, 2019 Price increase: $1.99 -> $2.99
  • June 14, 2019 Price increase: $1.99 -> $2.99
  • June 15, 2019 Price increase: $1.99 -> $2.99
  • June 15, 2019 Price increase: $1.99 -> $2.99
  • June 16, 2019 Price increase: $1.99 -> $2.99
  • January 06, 2020 New version 10
  • January 06, 2020 Price decrease: $2.99 -> $1.99
  • October 22, 2020 New version 12
  • January 26, 2021 New version 13
  • May 06, 2021 New version 14