How to return 0 if a pattern is matched from a file?
52920
Can grep return true/false or are there alternative methods
28459
How do regular expressions differ from wildcards used to filter files
8112
How to add text to end of line when pattern is matched?
6320
How to determine if a string contains any matches of a list of strings
116258
Count number of occurrences of a pattern on same line
34867
Using find to locate files that match one of multiple patterns
50943
shell test whether multiple lines string contains specified pattern in last line
144254
How to find files that match a wildcard string in Java?
10610
How can I check if a single character appears in a string?
77814
How to open or list all files whose name matches two patterns in Bash
95065
Grep -H not always returning file path when two matches are on the same line
47615
Awk: if pattern not found add some text at the end of file
137248
regular expressions / pattern matching on ubuntu command line
31054
Recursively search a pattern/text only in the specified file name of a directory?
86948
How to compare two column of two file and print not matching pattern with awk
65479
Search for multiple patterns from a file using find command
154662
FindFit returns Infinity::indet error when data contains {0,0}