The following info is available:
About HA HA is a small file archiver utility. It's main goal is to offer maximum compression without fancy addons. Commands of Unix version General form of command line for HA is : ha
[archive [search pattern list]] Command string starts with command character and includes optional switch characters. Available commands are: a[sdqemr012] Add files matching search pattern to archive. e[aqty] Extract files matching search pattern from archive. x[aqty] Extract files matching search pattern from archive using path information stored in archive. l[f] List files currently in archive. d[q] Delete files matching search pattern from archive. If archive does not contain any files after deletion it is removed. f[sdqemr012] Freshen files in archive. All files matching search pattern and newer than version already in archive are updated to archive. u[sdqemr012] Update files to archive. All files matching search pattern that are newer than version already in archive or are not yet in archive are updated to archive. t[q] Test files in archive. Available switches are: 0,1,2 Try compression method #. More than one can be specified. Methods are: 0-CPY Simple copying of files. 1-ASC Default method using sliding window dictionary followed by arithmetic coder. Offers quite good compression on wide variety of file types. 2-HSC Compression method based on finite context model and arithmetic coder. Quite slow for binary data, but offers very good compression especially for longer text files. y Assume answer yes on all questions. t Touch files when extracting. Sets file times to current machine time. r Recurse through subdirectories while searching for files matching search pattern. f Full listing of stored file information. m Move files when archiving. Files are removed from disk after they are successfully written to archive. a Set system specific file attributes when extracting files. s Find special files when archiving. e Do not store pathname information. q Quiet operation. d Make separate entries for directories. Saves information about empty directories, directory attributes etc. in archive.