Solution : https://service.sap.com/sap/support/notes/335521 (SAP Service marketplace login required)
Key words : 
naming convention 'itslinux_<patch level>, sap-specific compression program sapcar, 20 32-bit -> linux_32 -> database independent, call 'sapcar -xvf <archive, sap internet transaction server, 20 -> binary patches -> sap kernel 6, sap@web installation guide, internet transaction server, 'itswindows_<patch level>, sap service marketplace
Related Notes : 
       
| 939355 | ITS Up/Down: execution of application with parameters | 
| 935935 | ITS Up/Down: directory_list_files: performance improvement | 
| 933614 | ITS Calendar: cells of horizontal calendar too small | 
| 932585 | ITS HTML Viewer: IE: no scrollbars, if content is too big | 
| 926014 | ITS HTML Viewer: text area only single-line with SAP Events | 
| 923018 | ITS Up/Down: filename character encoding problem on MACOS | 
| 915681 | ITS Up/Down: no filter in FILE_SAVE_DIALOG, FILE_OPEN_DIALOG | 
| 906307 | ITS TextEdit: new selected text is not saved to R/3 | 
| 895069 | ITS HTML Viewer: codepage problem in HTML page | 
| 891201 | ITS HTML Viewer: inplace mode in gecko browser improved | 
| 889588 | SAP Internet Transaction Server Inst. 6.20-Patch20 or higher | 
| 888619 | ITS Up/Down: automation error in ITS 620 during upload | 
| 885369 | ITS HTML Viewer: document not displayed in extern mode | 
| 884786 | ITS Calendar: parameter cell_text_length does not work | 
| 876970 | ITS Calendar: reload, selection, scroll error in cal. popup | 
| 874833 | ITS HTML Viewer: HTMLB template error: ITS_REFERENCE_NULL | 
| 870373 | ITS HTML Viewer: Documents are not cached. | 
| 868919 | ITS TextEdit: incorrect behaviour in readonly mode | 
| 868815 | ITS TextEdit: HTML comment tag can not be displayed | 
| 864381 | ITS HTML viewer: Script error when using frame sets | 
| 863016 | ITS Calendar: scrollbar slider problem in popup navigator | 
| 862765 | ITS Up/Down: filenames with language specific characters | 
| 857282 | ITS HTML Viewer: ~urlmime not considered for inserted script | 
| 853159 | ITS HTML Viewer: Error with SAPEVENT in HTML anchor | 
| 851881 | ITS up/down: New service parameter ~appletServer | 
| 844383 | ITS Calendar: Calendar dialog box is empty | 
| 841690 | ITS TextEdit: Unnecessary blank lines at end of text | 
| 841196 | ITS TextEdit: Problem with mimetyp 'multipart/form-data' | 
| 830432 | ITS HTML Viewer: security popup, if using https (SSL) | 
| 829669 | ITS HTML viewer: SapEvent parameter is incorrect | 
| 827891 | ITS HTML Viewer: browser window rendered in the background | 
| 814775 | ITS HTML viewer: Incorrect display of XML files in Netscape | 
| 800014 | ITS HTML Viewer: spaces in Url leads to '500 ITS error' page | 
| 798365 | ITS Up/Down: Folders are not created during the download | 
| 791756 | ITS Up/Download: security warning comes up, if using https | 
| 790867 | ITS TextEdit: AGate crash in class CSapITSEditControl | 
| 788798 | ITS TextEdit: Incorrect forward navigation in ABAP Editor | 
| 787382 | ITS HTML VIEWER: Value pair missing in POSTDATA and QUERY_TA | 
| 780995 | ITS up/down: Blank characters in file path with ITS_Execute | 
| 773303 | ITS Calendar: Calendar button does not scroll synchronously | 
| 768063 | ITS TextEdit: Cursor cannot be set in read-only mode | 
| 767437 | ITS calendar: Date fields are not highlighted in color | 
| 766313 | ITS up/download: Error when used on Macintosh | 
| 763995 | SAP@WebStudio: Check syntax of HTMLB files incorrect | 
| 758362 | ITS Up/Download: File upload to Unicode R/3 is incorrect | 
| 750971 | ITS upload/download: Interim screens in SAP GUI for HTML | 
| 747962 | ITS HTML Control: Missing protocol not added in Url | 
| 747089 | ITS Toolbar: dynamic menus not shown in modal dialogs | 
| 743959 | ITS Up/Download: Unable to download files over 2.5 MByte | 
| 739378 | ITS EXCEPTION_ACCESS_VIOLATION corrected in AGate | 
| 737764 | IACOR - Publishing templates in custom namespaces | 
| 735752 | ITS Toolbar: Acc. menus not expandable by keystroke | 
| 725921 | iacor incorrect size of mimes after publishing | 
| 725839 | ITS TextEdit: Text disappears after search help (F4) | 
| 724257 | iacor IacorAdmin cannot connect to iacor service | 
| 722129 | SAP GUI for HTML: Menu texts are missing | 
| 720539 | iacor iacorcmd -i added to display all connections | 
| 720285 | iacor termination when publishing templates on Linux | 
| 718321 | iacor iacorcmd segmentation fault at start | 
| 711263 | Iacor: wrong encoding of language resource files | 
| 710873 | Iacor All users can edit with ITSAdmin Iacor | 
| 709275 | ITS Upload: Directory Browsing | 
| 709038 | SAP Integrated ITS | 
| 699584 | ITS Admin Debug settings have changed. | 
| 699362 | IACOR error with publishing of 'system' templates | 
| 695956 | ITS TextEdit: Double-click raises JavaScript error | 
| 695802 | ITS TextEdit: Multibyte handling of stream tables | 
| 674479 | ITS toolbar: Menus are not expanded (Netscape) | 
| 673134 | ITS ToolBar: Button statuses not refreshed, icon invisible | 
| 671862 | ITS Text Edit: Search with Find button incorrect | 
| 669904 | ITS TextEdit: Saving the selected text into R/3 | 
| 669766 | Missing button labels in the menu of the SAP GUI for HTML | 
| 669048 | ITS ToolBar: Locked/unlocked button status swapped | 
| 667063 | ALV GRID: button dropdown menu not shown | 
| 660214 | ITS toolbar: Static context menu sends function code | 
| 658652 | ITS text edit control - backslash is not displayed | 
| 649189 | Wintel Service manager can't stop SAPCCMSR agent with ITSmon | 
| 648673 | ITS URLs and Uptime wrongly displayed in RZ20. | 
| 572247 | IACOR signal handling added | 
| 570701 | IACOR useless registry keys removed | 
| 562945 | Unavailable in SAP GUI for HTML with JDK 1.4 | 
| 550554 | FAQ ITS Support Package 6.20 | 
| 526835 | SAP Internet Transaction Server Installation 6.20 | 
| 514958 | WP 2.11: workplac.car and ITS version | 
| 488314 | No data display for maps on the Web (ITS) | 
| 446027 | Constant 100% ITS server use due to wdbwitts process | 
| 445644 | BW Web Report Charts on Windows CE | 
| 432458 | Display of blank cells in BW report charts | 
| 383549 | Patch strategy Internet Transaction Server | 
| 374959 | |
| 374401 | Correction of the ITS 4.6D for BW 2.0B | 
| 366642 | WP2.11: Drag and Relate links to MiniApps | 
| 366052 | ITS versioning | 
| 336693 | Replacing or installing librfc32.dll on Microsoft Windows | 
| 331407 | ITS patch installation of SAR packages (IAC packages) | 
| 330793 | Downloading patches | 
| 97621 | OCS Info: Online Correction Support (OCS) |