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UNIX Commands and Command Shells

UNIX File Names
File Names in UNIX File names in UNIX are case sensitive, are interpreted as a single string of characters, and may contain any number of period (".") separators. There are no separate limitations for specific parts of a file name, such as the extension following the ".". However, there are standard naming conventions which include indicating the type of file using specific extensions on the file name. Since searches for files rely on consistent use of these extensions, it is bad form to use variations that might be recognized as equivalents in other operating systems, especially truncating an extension such as ".html" to ".htm", which was used for 8.3 file names in Windows 3.1 and is sometimes still recognized as being equivalent to ".html" in later versions of Microsoft Windows. back to top

File Names in UNIX

File names in UNIX are case sensitive, are interpreted as a single string of characters, and may contain any number of period (".") separators. There are no separate limitations for specific parts of a file name, such as the extension following the ".". However, there are standard naming conventions which include indicating the type of file using specific extensions on the file name. Since searches for files rely on consistent use of these extensions, it is bad form to use variations that might be recognized as equivalents in other operating systems, especially truncating an extension such as ".html" to ".htm", which was used for 8.3 file names in Windows 3.1 and is sometimes still recognized as being equivalent to ".html" in later versions of Microsoft Windows.

File Permissions
Display File Permissions `ls -l filepath ls -l ls -ld .` Change File Permissions `chmod 644 filepath chmod 750 command chmod 755 dirpath` back to top

File Permissions

Display File Permissions


                  ls -l filepath
                  
                  

                  ls -l
                  

                  ls -ld .

Change File Permissions


                  chmod 644 filepath
                  
                  

                  chmod 750 command
                  
                  

                  chmod 755 dirpath

Last updated Tuesday October 3, 2006

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UNIX Commands and Command Shells

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