chmod [-fileid] mode filelist Set permissions of each of the files in the list filelist to mode, where mode is an absolute numeric mode or symbolic permissions as in the UNIX chmod(1) command. To specify a mode as octal, it should be prefixed with a "0" (e.g. 0622). If the option -fileid is specified, filelist is a list of open file identifiers rather than a list of file names. This option is not available on all Unix systems. Use the infox have_fchmod command to determine if this functionality is available. The chmod command is not available on Windows 95/NT. This command is provided by Extended Tcl.