CheatSheets-For-Everybody

Operators

Bash Code

#!/bin/bash
# Count number of characters in a variable:
#     echo $variable | wc -c

# Variable to encode
var="nef892na9s1p9asn2aJs71nIsm"

for counter in {1..35}; do
  var=$(echo $var | base64)
  if [[ counter -eq 35 ]]; then
    echo $var | wc -c
  fi
done

---

IF Operators

Operator	Description
-eq	equal to
-lt	less than
-le	less than or equal to
-eq	is equal to
-ne	is not equal to
-gt	is greater than
-ge	is greater than or equal to

---

File Operators

Operator	Description
-e	if the file exists
-f	tests if it is a file
-d	tests if it is a directory
-L	tests if it is a symbolic link
-N	checks if the file was modified after it was last read
-O	if the current user owns the file
-G	if the file’s group id matches the current user’s
-s	tests if the file has a size greater than 0
-r	tests if the file has read permission
-w	tests if the file has write permission
-x	tests if the file has execute permission