Is there a way in Bash to determine if a character exists in a string?
31087
How to check if a string contains a substring in Bash
17361
How to check if a string has spaces in Bash shell
103977
bash: looping through characters not working
68020
How do I check if a given string is a legal/valid file name under Windows?
98451
Why can't I echo the characters #! in a string in bash?
101155
How to check if a string in Python is in ASCII?
119001
Check if multiple strings exist in another string
65529
How do I escape the wildcard/asterisk character in bash?
116317
How to perform a for loop on each character in a string in Bash?
2085
How would you count occurrences of a string (actually a char) within a string?
2559
Is there a regular expression to detect a valid regular expression?
22156
How do I tell if a regular file does not exist in Bash?
62812
How to convert a string to lower case in Bash?
5672
How to find nth occurrence of character in a string?
26533
Python - Check If Word Is In A String
94281
How can I grep for a string containing regex metacharacters like $ and '?
16672
Shell script check if file exists?