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Tony's Random Cheat Sheet (DRAFT) by

Helpful things to know!

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Bash Binary Operators

Arithmetic
String
Meaning
-eq
==
equal to
-ne
!=
not equal to
-lt
\<
less than
-le
  
less than or equal to
-gt
\>
greater than
-ge
  
greater than or equal to

Unwrap LDIF Output

sed 'N;s/\n //;P;D;' filena­me.ldif
perl -p -0040 -e 's/\n //' filena­me.ldif

AWS Accounts

Account#
Root Account
Purpose
x1735
Security
x1319
Billing
x6872
N/A
Cloudt­icity
x7464
N/A
Demand­Trans
x1123
Legacy Intranet
x9642
CW Health Forum
x0548
???
x8811
EDP/CCA

EDP/CCA Regions

Enviro­nment
IP Range
Region
Develo­pment
10.51.0.0/16
Ohio
Staging
10.50.0.0/16
Virginia
Production
10.52.0.0/16
Oregon
 

LDAP Special Characters

,
comma
+
plus sign
"
double quotation mark
**
backslash
<
less than
>
greater than
;
semicolon
=
equals sign
#
octothorpe

Bash Variables

$0
filename of script
$1
positional parameter #1
$2-$9
positional parameters #2 - #9
${10}
positional parameter #10
$#
number of positional parameters
"­$*"
all the positional parameters (as a single word) *
"­$@"
all the positional parameters (as separate strings)
${#*}
number of positional parameters
${#@}
number of positional parameters
$?
return value
$$
process id (pid) of script
$-
flags passed to script (using set)
$_
last argument of previous command
$!
process id (pid) of last job run in background
 

Outbound Metra Trains

Depart Chicago
Arrive Palatine
3:45
4:31
4:05
5:08
4:39
5:31
4:48
5:42
4:57
5:39
5:16
5:55
5:23
6:26
5:33
6:20
5:47
6:50
6:01 *
6:50
6:25
7:09
6:30
7:26
* transfer at Arlington Park