This seems simple but I can not figure it out. I have two user rob and erik both belong to a group called ivdev. ivdev is the group owner of /var/web/www. Neither user can create new files. If I give other permission to write then this will work but defeats the purpose of the group.

erik@web1:/var/web$ id -Gn erik
erik adm cdrom sudo dip plugdev lxd lpadmin sambashare ivdev

erik@web1:/var/web/www$ id -Gn rob 
rob sudo ssh ivdev

erik@web1:/var/web/www$ touch this
touch: cannot touch 'this': Permission denied

erik@web1:/var/web/www$ su rob
rob@web1:/var/web/www$ touch that
touch: cannot touch 'that': Permission denied

erik@web1:/var/web/www$ cd ..
erik@web1:/var/web$ ls -l
drw-rw-r-x 2 root ivdev 4096 Nov 21 17:22 www


  • And what is the group permissions on www? – George Udosen Nov 22 '17 at 5:58

Since nobody has x permission, nobody except root can traverse the directory www to access any file inside... See "Accessing files in a directory without x-permission" on this board.

  • Making the permissions 775 did the trick. I guess that my understanding of the execute permission was wrong. I thought that a user just needed read/write to work on the files in a folder and an application or server would need execute permission to run the files (py, bash, php, etc). – Eman Nov 22 '17 at 23:27
  • @Eman: Permission x for files means that they are executable. Permission x for directories means that they are traversable (to get to the files inside). – AlexP Nov 23 '17 at 0:13

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