Notes:

• File Types - bytestream vs. fixed record
• can contain up to 256 characters, except when the file is under an MPE group or account, then 16 characters is the limit
• can be any combination of:
  • alphanumeric character
  • special character + - _ .
• case matters - file1, FILE1, File1, fILE1 are different files

• Files starting with . (dot) are hidden and not normally listed, use ls -a

> cat > file1        (Enter/Return to end each line, CTRL-Y to finish)
> vi file1
> ls     

> more file1
> cat  file1
> lp   file1     

> cp file1 file2     (If file2 exists, it is overwritten.)
> mv file1 file2     (If file2 exists, it is overwritten.)
> rm file2     

• Display a file's permissions:

> ls -l
-rw-r--r--  1  CGI.APACHE   APACHE   57   Feb 2 19:26   file1
-rw-r--r--  1  CGI.APACHE   APACHE   57   Feb 2 19:26   file2     

• Change a file's permissions:

> chmod u+x file1     

• Change a file's ownership:

> chown MGR.APACHE file1     

• Change a file's group:

> chgrp SYS file1    
> ls -l
-rwxr--r--  1  MGR.APACHE   SYS      57   Feb 2 19:26   file1
-rw-r--r--  1  CGI.APACHE   APACHE   57   Feb 2 19:26   file2