View source for Centos File System Commands

'''File Command displays type of file'''
 file me.text
 #output
 ASCII text
'''Wildcard Metacharacters '''
<pre>
* Matches 0 or more characters in a filename
? Matches 1 character in a filename
[aegh]  Matches 1 character in a filename—provided this character is either an a, e, g, or h
[a-e]  Matches 1 character in a filename—provided this character is either an a, b, c, d, or e
[!a-e] Matches 1 character in a filename—provided this character is NOT an a, b, c, d, or e
</pre>
'''Viewing Text Files'''
 cat -n file.txt
 # will display the file with line numbers
 tac file.text
 #will display the file in reverse
'''The head command displays the first 10 lines (including blank lines) of a text file to the terminal screen but can also take a numeric option specifying a dif- ferent number of lines to display. '''
 head -3
'''tail command can be used to display the end of text files. By default, the tail command displays the final 10 lines of a file, but it can also take a numeric option specifying the number of lines to dis- play on the terminal screen'''
 tail -3