Hello All, Few things are not clear to me, I would appreciate, if somebody can help me understand the concept. I have included my copy of /etc/group and /etc/passwd file.
Q1. When I launch cygwin using shortcut on my desktop which is basically pointing to cygwin.bat , when I issue id command, I get the following output $ whoami Guest Guest@SGUPTA-LAPT ~ $ id uid=501(Guest) gid=513(None) groups=513(None) Now, if I do login to Guest user as ssh $ ssh guest@sgupta-lapt guest@sgupta-lapt's password: Last login: Fri Apr 5 21:19:13 2002 Fanfare!!! You are successfully logged in to this server!!! Guest@SGUPTA-LAPT ~ $ id uid=501(Guest) gid=513(None) groups=0(Everyone),513(None),546(Guests),547(Power Users),545(Users),1001(ORA_DBA) Guest@SGUPTA-LAPT ~ $ See the difference between the id commands between the same user. One login was done using shortcut on desktop and other is using ssh. Any logic behind this ? Q2: I have read the Documentation provided by CYGWIN but was unable to find out where the information is kept regarding groups a user has. In Unix like system, if suppose I have a group called staff , then you can easily see the group staff is assigned to which users by looking /etc/group file but I was unable to find this information in CYGWIN /etc/group . My guess is CYGWIN basically picking this information from Windows database, only Primary Group information is kept in /etc/passwd file and secondary groups are taken from Windows database. It is not kept in /etc/group in CYGWIN. Is my understanding correct ? Q3: When logged in via ssh, if I run $ id -Gn None Everyone Guests Power Users Users ORA_DBA It displays all the Primary and Secondary Groups belong to the current user. My current user is Guest. but when I specify $ id -Gn Guest None It only displays None which is the Primary Group for Guest user but according to id command documentation, it should display all the Secondary groups as well. Is there some problem with id command or my understanding is not correct, The above gives works as expected in my Sun OS. ----------------------------------------------- My copy of /etc/group and /etc/passwd $ cat /etc/group Everyone:S-1-1-0:0: SYSTEM:S-1-5-18:18: None:S-1-5-21-606747145-492894223-1708537768-513:513: Administrators:S-1-5-32-544:544: Backup Operators:S-1-5-32-551:551: Guests:S-1-5-32-546:546: Power Users:S-1-5-32-547:547: Replicator:S-1-5-32-552:552: Users:S-1-5-32-545:545: ORA_DBA:S-1-5-21-606747145-492894223-1708537768-1001:1001: $ cat /etc/passwd Everyone:*:0:0:,S-1-1-0:: SYSTEM:*:18:18:,S-1-5-18:: Administrators:*:544:544:,S-1-5-32-544:: Backup Operators:*:551:551:,S-1-5-32-551:: Guests:*:546:546:,S-1-5-32-546:: Power Users:*:547:547:,S-1-5-32-547:: Replicator:*:552:552:,S-1-5-32-552:: Users:*:545:545:,S-1-5-32-545:: ORA_DBA:*:1001:1001:,S-1-5-21-606747145-492894223-1708537768-1001:: Administrator:unused_by_nt/2000/xp:500:513:U-SGUPTA-LAPT\Administrator,S-1-5 -21- 606747145-492894223-1708537768-500:/home/Administrator:/bin/bash Guest:unused_by_nt/2000/xp:501:513:U-SGUPTA-LAPT\Guest,S-1-5-21-606747145-49 2894 223-1708537768-501:/home/Guest:/bin/bash sgupta:unused_by_nt/2000/xp:1000:513:Sanjay,U-SGUPTA-LAPT\sgupta,S-1-5-21-60 6747 145-492894223-1708537768-1000:/home/sgupta:/bin/bash Thanks in advance. Sanjay Gupta -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
