unable to cd to a directory owned by me and have rw permission?
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From: Nasser M. Abbasi on 27 May 2010 01:48 Hello, This is on debian: # uname -a Linux me 2.6.26-2-686 #1 SMP Wed May 12 21:56:10 UTC 2010 i686 GNU/ Linux I am trying Linux again after many years. And trying to remember many of its commands. But this one got me really confused. I copied a directory tree over as a root from another device as root (the device happened to be a mount disk which has my windows data, so it was an NTFS disk, but this should have nothing to do with the following). Then as a root, I changed the owner of the directory to be a user called "me". Also, as root, changed the group id of the folder to the group which "me" belonged to, which happened to be called "me" also. So, now the directory and everything in it is owned by "me" and group "me". I also changed permission to be u+rw on the directory and everything in it. Now, when I am become user "me", I am unable to cd to the directory. I get permission denied error. I can cd to the directory as root. but not as user "me". Any one has an idea? Here are the commands and the results: me(a)me:~/tmp$ ls -ld HW1/ drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1/ me(a)me:~/tmp$ whoami me me(a)me:~/tmp$ id uid=1000(me) gid=1000(me) groups=20(dialout),24(cdrom),25(floppy), 29(audio),44(video),46(plugdev),110(netdev),115(powerdev),1000(me) me(a)me:~/tmp$ ls -l HW1 ls: cannot access HW1/post.bat: Permission denied ls: cannot access HW1/build.bat: Permission denied ls: cannot access HW1/ee420_hw1.bak: Permission denied total 0 -????????? ? ? ? ? ? build.bat d????????? ? ? ? ? ? ee420_hw1 -????????? ? ? ? ? ? ee420_hw1.aux me(a)me:~/tmp$ Now I change to root, and cd, and it works: me(a)me:~/tmp$ su Password: me:/home/me/tmp# ls -ld HW1 drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1 me:/home/me/tmp# cd HW1 me:/home/me/tmp/HW1# ls -l total 632 -rw----rw- 1 me me 31 2010-05-26 21:57 build.bat drwx---rw- 2 me me 12288 2010-05-26 21:58 ee420_hw1 -rw----rw- 1 me me 669 2010-05-26 21:58 ee420_hw1.aux I must be doing something silly, but do not see it now. Any ideas? thanks --Nasser
From: Nasser M. Abbasi on 27 May 2010 02:08 On May 26, 10:48 pm, "Nasser M. Abbasi" <n...(a)12000.org> wrote: > Hello, > > This is on debian: > > # uname -a > Linux me 2.6.26-2-686 #1 SMP Wed May 12 21:56:10 UTC 2010 i686 GNU/ > Linux > > I am trying Linux again after many years. And trying to remember many > of its commands. > > But this one got me really confused. > > I copied a directory tree over as a root from another device as root > (the device happened to be a mount disk which has my windows data, so > it was an NTFS disk, but this should have nothing to do with the > following). > > Then as a root, I changed the owner of the directory to be a user > called "me". > > Also, as root, changed the group id of the folder to the group which > "me" belonged to, which happened to be called "me" also. > > So, now the directory and everything in it is owned by "me" and group > "me". > > I also changed permission to be u+rw on the directory and everything > in it. > > Now, when I am become user "me", I am unable to cd to the directory. I > get permission denied error. > I can cd to the directory as root. but not as user "me". > > Any one has an idea? Here are the commands and the results: > > me(a)me:~/tmp$ ls -ld HW1/ > drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1/ > > me(a)me:~/tmp$ whoami > me > > me(a)me:~/tmp$ id > uid=1000(me) gid=1000(me) groups=20(dialout),24(cdrom),25(floppy), > 29(audio),44(video),46(plugdev),110(netdev),115(powerdev),1000(me) > > me(a)me:~/tmp$ ls -l HW1 > ls: cannot access HW1/post.bat: Permission denied > ls: cannot access HW1/build.bat: Permission denied > ls: cannot access HW1/ee420_hw1.bak: Permission denied > total 0 > -????????? ? ? ? ? ? build.bat > d????????? ? ? ? ? ? ee420_hw1 > -????????? ? ? ? ? ? ee420_hw1.aux > me(a)me:~/tmp$ > > Now I change to root, and cd, and it works: > > me(a)me:~/tmp$ su > Password: > > me:/home/me/tmp# ls -ld HW1 > drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1 > > me:/home/me/tmp# cd HW1 > > me:/home/me/tmp/HW1# ls -l > total 632 > -rw----rw- 1 me me 31 2010-05-26 21:57 build.bat > drwx---rw- 2 me me 12288 2010-05-26 21:58 ee420_hw1 > -rw----rw- 1 me me 669 2010-05-26 21:58 ee420_hw1.aux > > I must be doing something silly, but do not see it now. Any ideas? > > thanks > --Nasser I found if I apply chmod 777 to the folder (as root), then I can access the folder as user "me". Which is strange, since the folder is owned by "me"? me(a)me:~/tmp$ cd HW1/ bash: cd: HW1/: Permission denied me(a)me:~/tmp$ su Password: me:/home/me/tmp# chmod -R 777 HW1 me:/home/me/tmp# exit exit me(a)me:~/tmp$ cd HW1 me(a)me:~/tmp/HW1$ ls -l total 632 -rwxrwxrwx 1 me me 31 2010-05-26 21:57 build.sh drwxrwxrwx 2 me me 12288 2010-05-26 22:57 ee420_hw1 -rwxrwxrwx 1 me me 669 2010-05-26 21:58 ee420_hw1.aux -rwxrwxrwx 1 me me 29201 2010-05-26 21:58 ee420_hw1.bak Why? --Nasser
From: Kevin D. Snodgrass on 27 May 2010 06:20 Nasser M. Abbasi wrote: > me(a)me:~/tmp$ ls -ld HW1/ > drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1/ [snippage] > I must be doing something silly, but do not see it now. Any ideas? chmod 777 HW1 or chmod 755 HW1 You need "execute" permission to enter a directory, even if you own it.
From: Nasser M. Abbasi on 27 May 2010 06:33
On May 27, 3:20 am, "Kevin D. Snodgrass" <kdsnodgr...(a)yahoo.com> wrote: > Nasser M. Abbasi wrote: > > me(a)me:~/tmp$ ls -ld HW1/ > > drw-rw-rw- 3 me me 4096 2010-05-26 21:58 HW1/ > > [snippage] > > > I must be doing something silly, but do not see it now. Any ideas? > > chmod 777 HW1 > > or > > chmod 755 HW1 > > You need "execute" permission to enter a directory, even if you own it. Yes, thanks, I was about to make a post that I "discovered" this by trial and error when I saw your post. Now, this is what I do after I copy a tree from windows over to linux to make sure tree is OK for me to use: cd to root of tree, and type: find -type d -print0 |xargs -0 chmod 744 find -type f -print0 |xargs -0 chmod 644 The above seems to fix things so I can use the tree now on linux. --Nasser |