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notes:unix:spring2024:classnotes [2024/03/22 20:41] – cgrant9notes:unix:spring2024:classnotes [2024/04/16 17:19] (current) – cgrant9
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 ======UNIX class notes====== ======UNIX class notes======
-[[#Cleaned VI Notes|VI Notes]]+[[#Week 5|In Depth VI Notes]] 
 + 
 +[[#Cleaned VI Notes|Basic VI Notes]] 
 + 
 +[[#Week 9|REGEX's]]
  
 =====Week 1===== =====Week 1=====
 +<fs xx-large>Welcome to the best class you have ever taken</fs>
 +
 +This page includes some notes, typically major things, from each class session
  
 +Please add notes whenever you can = )
 =====Week 2===== =====Week 2=====
 *Re-went over group and pwd command *Re-went over group and pwd command
Line 242: Line 250:
 ---------------- ----------------
 =====Tuesday===== =====Tuesday=====
 +Virtual class session day
 +
 +Started discussing wpa0
 +
 +in a man page, or vi, or a less pager you can use a forward slash to search for something
 +
 +Remember wildcards are specifically filenames, regex's are for text
 +
 +REGULAR EXPRESSIONS!!!!!!!
 +  
 +Basic REGEX (in Unix)
 +   * .  match any symbol (similar to ? in wildcards)
 +   * *  match zero or more of the previous (similar, but different to * in wildcards)
 +   * ^  match start of line
 +   * $  match end of line
 +   * \< match start of word
 +   * \> match end of word
 +   * [ ] character class; match any one of enclsed (similar to use as wildcard)
 +   * [^ ] inverted character class; do not match any of enclosed (similar to use as wildcard)
 +
 +Extended REGEX
 +   * + match 1 or more of the previous
 +   * | logical or
 +   * ( ) group together
 +   * \( \) REGEX group
 +   * ? match previous item at most once (0-1)
 +   * {n} match previous item exactly n times ie " {3}" looks for exactly 3 spaces
 +   * {n,} match previous n or more times
 +   * {,m} match previous at most m times
 +   * {n,m} match previous at least n, but no more than m times
 +
 +3 types of grep used to be used based on what REGEX's you need
 +   *fgrep - fast grep; no REGEX use
 +   *grep - regular grep; basic REGEX use
 +   *egrep - extended grep; extended REGEX use
 +
 +you can still use extended regex with a regular grep, but they need to be preceded by a \, ie a grep "\?" should work like egrep "?"
 +
 +diff - a command that can show differences in files, assuming they are sorted
 +
 =====Thursday===== =====Thursday=====
 ---------------- ----------------
-=====Week 10=====+No class, free day to experiment and work on projects 
 +=====Weeks 10-14=====
 ---------------- ----------------
-=====Tuesday===== +Mostly given time to work on projects, the last major discussion was Regex's, and a quick base 11 pct 
-=====Thursday===== +Work on your EoCE  
----------------- +
-=====Week 11===== +
----------------- +
-=====Tuesday===== +
-=====Thursday===== +
----------------- +
-=====Week 12===== +
----------------- +
-=====Tuesday===== +
-=====Thursday===== +
----------------- +
-=====Week 13===== +
----------------- +
-=====Tuesday===== +
-=====Thursday===== +
----------------- +
-=====Week 14===== +
----------------- +
-=====Tuesday===== +
-=====Thursday=====+
  
 =====Cleaned VI Notes===== =====Cleaned VI Notes=====
notes/unix/spring2024/classnotes.1711140114.txt.gz · Last modified: 2024/03/22 20:41 by cgrant9

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