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What is the meaning of special character in Bash?
meta-characters
Special characters. Some characters are evaluated by Bash to have a non-literal meaning. Instead, these characters carry out a special instruction, or have an alternate meaning; they are called “special characters”, or “meta-characters”.
What does AZ mean in Linux?
Notice when the command echo [a-z] is called, the expected output would be all files with lower case characters. Also, with echo [A-Z] , files with uppercase characters would be expected.
What range does lowercase characters az use?
ASCII value of uppercase alphabets – 65 to 90. ASCII value of lowercase alphabets – 97 to 122.
How to use special characters in Echo shell?
Note that since echo is a shell built-in it doesn’t follow the usual conventions regarding quoting, so just quoting the argument will output the quotes instead of removing them. In order to use special characters, such as ‘>’ on Windows with echo, you need to place a special escape character before it.
Where are the special characters on the keyboard?
Special Characters — Alt Keyboard Sequences Character Sequence backspace† Alt 8 tab† Alt 9 line break† Alt 10 ¤ Alt 15
Which is an example of quoting special characters?
Here is a more practical example of quoting special characters. A few UNIX commands take arguments that often include wildcard characters, which need to be escaped so the shell doesn’t process them first. The most common such command is find, which searches for files throughout entire directory trees.
When does a dot match a single character?
When matching characters, as part of a regular expression, a “dot” matches a single character. partial quoting [double quote]. “STRING” preserves (from interpretation) most of the special characters within STRING. See Chapter 5. full quoting [single quote].