mv *.jpg /target/directory: This command would move all files in the current directory that have names that begin with a lowercase letter and end with the “.jpg” extension to the /target/directory directory.ls a*b*.txt: This command would list all files in the current directory that have names that begin with the letter “a”, followed by zero or more characters, followed by the letter “b”, followed by zero or more characters, and end with the “.txt” extension.You can also use multiple wildcards in a single command. grep 'ERROR' *.log: This command would search all files in the current directory that have the “.log” extension for the string “ERROR”.rm a*.txt: This command would delete all files in the current directory that have names that begin with the letter “a” and end with the “.txt” extension.cp * /target/directory: This command would copy all files in the current directory to the /target/directory directory.Here are a few more examples of how the wildcard character can be used in the Bash CLI: The asterisk is a placeholder for any characters that might appear before or after the ".txt" extension. It is used to match zero or more characters in a file name or a path.įor example, the command ls *.txt would list all files in the current directory that have the ".txt" extension. In the Bash command line interface (CLI), the wildcard character is the asterisk ( *). ![]() This expression means: From the beginning of the string ( ^), zero or more spaces or tabs ( \011 is the octal ASCII number for a tab character), zero or one sign, one or more digit, zero or more spaces/ tabs, and finally match the end of string.Wildcard Selection in Bash Select zero or more characters in a file name or a path using * ![]() result=STRMATCH(string, '^.+$') This interesting example matches any integer number, possibly surrounded by spaces and/or tabs. result=STRMATCH(string, '^.$') Matches strings three characters or longer. result=STRMATCH(string, '^ *$') Matches only three-character strings. result=STRMATCH(string, '^$') Matches either blank or null strings (Between the beginning ( ^) and the end ( $) there are only zero or more spaces ( *)). result=STRMATCH(string, '.') Matches only empty strings (start and end with nothing in between). result=STRMATCH(string, '\\.') Matches any string containing any character (that is, any non-null string). Remember that it takes two backslashes in a PV-WAVE string to produce the single back slash that “escapes” the dot (. ' 3.14159' matches ' the quick brown fox' does not match. result=STRMATCH(string, 'Ll+') result=STRMATCH(string, '^.*x$') Matches any string containing a period. result=STRMATCH(string, '^at') Matches any string containing ' L' followed by one or more occur rences of ' l': ' Get a Llama' matches ' larry the llama' does not match (first l in llama is lower case). result=STRMATCH(string, 'a') Matches any string beginning ( ^) with Cat, bat, and so on: ' Cat Woman', ' catatonic', ' Batman, the animated series' but does not match: ' cat' (begins with a space), ' cab', and so on. Matches any string containing the character ' a'. ![]() The following PV‑WAVE commands demonstrate the regular expression pattern matching used in the STRMATCH command. Assume that string is a string array defined in PV‑WAVE.
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