updates from bash book

data/survey_scores_2015_T.csv

@@ -0,0 +1,15 @@
+subject_id,computer_has,computer_os,score_bash,score_command,score_matlab,score_perl,score_python,score_r
+10000,N,,0,0,0,0,0,0
+13001,Y,Mac,1,2,3,0,0,0
+60985,Y,Windows,0,1,1,0,2,1
+43309,Y,Mac,3,3,0,0,1,2
+89785,Y,Windows,2,2,0,1,2,2
+57688,Y,Mac,1,1,1,0,0,0
+19366,Y,Mac,0,2,3,0,0,2
+97775,Y,Mac,2,2,3,0,1,0
+22384,Y,Windows,0,0,2,0,0,2
+31556,Y,Mac,1,2,3,0,0,0
+70964,Y,Mac,1,1,2,0,1,2
+70155,Y,Linux,1,1,1,0,1,0
+47724,Y,Mac,0,0,1,0,0,0
+37602,Y,Linux,2,2,0,1,1,2

lessons/lesson02.md

@@ -19,7 +19,9 @@ Skills you will learn in this lesson:
 
 * `pwd` -- print working directory
 * `ls` -- list contents of working directory
-* `cd DIRECTORY` or `cd` -- change directory, change to home directory
+* `cd DIRECTORY` -- change to directory
+* `cd` -- change to home directory
+* `cd -` -- change to previous directory
 * `mkdir DIRECTORY` -- make directory
 * `rmdir DIRECTORY` -- remove empty directory
 * `touch FILE` -- create an empty file
@@ -34,6 +36,7 @@ Skills you will learn in this lesson:
 #### Working with commands and processes
 
 * `man COMMAND` -- display manual page of command if it exists
+* `help COMMAND` -- display help description of command if it exists
 * `which COMMAND` -- show location of command
 * `history` -- display past commands
 * `top` -- display current processes
@@ -114,8 +117,6 @@ alias taill='ls -lrt | tail'
 * `<` -- get output of file (other type of redirect)
 * `` `COMMAND` `` -- pass output of a command (e.g., in a for loop)
 
-### Paths and variables
-
 #### Absolute and relative paths, symbolic links
 
 * `.` -- current directory
@@ -125,6 +126,25 @@ alias taill='ls -lrt | tail'
 * `~` -- home directory
 * `ln -s FILE LINK` -- make a symbolic link
 
+#### Wildcards
+
+* `?` - match any single character
+* `*` - match any string of characters
+* `[set]` - match any character in set
+* `[!set]` - match any character *not* in set
+
+#### Brace expansion
+
+* `{start..end}` - expand a range; e.g., `b{ed,olt,ar}s`, `{2..5}`, `{d..h}`
+
+#### Control keys
+
+* `CTRL-C` - stop current command
+* `CTRL-D` - end of input
+* `CTRL-Z` - suspend current command
+
+### Variables, bash scripts, and dot-files
+
 #### Bash variables and commands
 
 * `A=0` -- assign a variable
@@ -136,8 +156,6 @@ alias taill='ls -lrt | tail'
 * `$HOME` -- your home directory (another name for `~` or `/Users/you`)
 * `for VARIABLE in LIST; do COMMANDS; done` -- `for` loop in bash
 
-### Executing bash scripts and dot-files
-
 #### Commands
 
 * `bash SCRIPT.sh` -- run a bash shell script