Permissions are the unix way of controlling access to resources such as files, directories and devices and may be specified for an owner, group, or all users.

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2
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1answer
17 views

Changing file permissions on an HFS+ filesystem

I ran the command fdisk -l to find out what my external drive is formatted to, I found out it's uses GPT partitions and the filesystem is HFS+. When I try and create a new folder on the external ...
6
votes
3answers
10k views

How to get back sudo on Ubuntu?

I have done this: sudo chown -R myname /usr/ and now I can't use the sudo command because of this error: sudo: must be setuid root And as I read this means that the owner of this file ...
0
votes
2answers
34 views

need give read write access to a folder and its subfolders and directories for a particular user

Could you help me to provide read/write access to a folder, its sub-folders and all the files below for a particular user? I tried to use the getfacl command, but didn't find a solution. I'm using ...
3
votes
1answer
37 views

groupadd failure while writing changes to /etc/group

I have been following this guide on installing debian-kit on my Sony Xperia Tablet Z and the installation goes fine until I try to apt-get install andromize which fails with the error groupadd: ...
2
votes
1answer
33 views

What to do when you removed execute permission from some system binaries or libraries?

It seems I removed executability from system binaries, resulting in loads of Permission denied. Do I have to force reboot into host's rescue mode or is there something else I can do while I'm still ...
98
votes
6answers
6k views

How to chmod without /usr/bin/chmod?

Today I was told a tale by a Unix trainer, a tale where the root password got leaked to the students, and one of the fellas removed the execute permission from /usr/bin/chmod itself. How do you ...
0
votes
1answer
42 views

Git / Jenkins permission problem

OS: Ubuntu server 10.04 LTS I have a strange issue going on with permissions and can't seem to track down what is causing it. The setup is as follows: Git Repository folders (and files in them) are ...
0
votes
1answer
2k views

How do I set permissions recursively on a dir (with ACL enabled)?

For example, I want to give my colleagues write access to certain directory. Let's assume that subdirectories in it had access rights 775, files 664, and also there were some executable files in the ...
3
votes
1answer
18 views

How to make a cifs/smb mount ignore umask?

I have a cifs mount that is mounted from /etc/fstab. But I would quite like creation of files/dirs on that share to ignore my umask. Is that possible? It seems that cifs does not support the umask=000 ...
1
vote
1answer
96 views

/usr/sbin/sendmail: Permission denied

I am trying to setup the mail on my fedora 20. Every time I try to fire a test mail it tells me the permission is denied on /usr/sbin/sendmail. I checked the permissions and this is the output: ...
2
votes
1answer
352 views

Permissions in Ext4 Truecrypt Drive

I just used the Truecrypt GUI to encrypt my entire USB hard drive (currently /dev/sdb). I formatted it to ext4. Now, I can mount it in my home directory with the command truecrypt --mount ...
2
votes
2answers
374 views

SMB Mount To Windows Server Appears to Lock up. Any Ideas?

We are running CentOS 6.3 with all the latest updates. (Attempt to resolve this issue) The Server I am trying to connect to is a Windows Server 2008 R2 box. Though this applies to our old SBS'03 Box ...
2
votes
2answers
31 views

How to give Windows partions' file execute permission

I have installed Linux Mint 17 and Windows 8, as dual boot. 500GB hard disk has 5 partitions. Two of them are NTFS and the other 3 are ext4 partitions. When I log into Windows, I can not see any ...
1
vote
1answer
25 views

Using scp to transfer files to an android device

I have a file on a remote server that I want to transfer to my android device over ssh, only using the android device in the process. Using this setup, I tried an scp from the android device ...
0
votes
0answers
7 views

Map a network share folder in Debian with read-write permission

I want to mapped a folder on samba server at Debian Squeeze startup. I found a guidance by google as following: Open file /etc/fstab and add line //server/share /mnt/dir smbfs ...
0
votes
2answers
25 views

Why can't my python script change umask?

This is my script #!/usr/bin/python import os print "hello world from python" os.system("echo 'hello world from bash'") os.system("umask 055") os.system("ls -alh > test") If I run this code ...
39
votes
6answers
72k views

How do I copy a folder keeping owners and permissions intact?

So I was going to back up my home folder by copying it to an external drive as follows: sudo cp -r /home/my_home /media/backup/my_home With the result that all folders on the external drives are ...
0
votes
2answers
456 views

Linux Permissions vsftpd

I have mybb installed and running in /var/www/forums. I have two users part of the www group, logan and www-data. I have the recursive permissions of forums directory set to: chmod -R 755 forums ...
1
vote
1answer
277 views

How to edit /var/www files using phpstorm?

I want to edit the /var/www files using any editor like phpstorm or eclipse etc, without changing the default user/groups setting for /var/www. Since phpstorm is invoke by a script , I dont know how ...
2
votes
1answer
78 views

Why can't mv preserve permissions when moving between Android SD cards?

After mounting both SD cards on an Android phone using the "USB mass storage" mode I keep getting these messages when moving files between them: mv: failed to preserve ownership for ‘/.../foo’: ...
2
votes
3answers
933 views

Limited SSH user on Ubuntu 12

I'm running Minecraft on a server. How can I give my friend SSH access just to the minecraft folder (a root folder), the screen command, and some ports?
1
vote
2answers
3k views

How to insert text into a root-owned file using sudo? [duplicate]

Possible Duplicate: Redirecting stdout to a file you don't have write permission on Running a command like sudo echo 'text' >> /file.txt fails with: bash: /file.txt: Permission ...
4
votes
1answer
101 views

Find directories and files with permissions other than 775 / 664

I am moving a website from one server to another and Git does not store metadata such as file permissions. I need to find the directories and files that are not 775 / 664 respectively. Right now, I'm ...
6
votes
2answers
5k views

I added a user to a group, but group permissions on files still have no effect

I changed permissions of a file (chmod g+w testfile) and running ls -l testfile gives: -rwxrwxr-x 1 user1 user1 0 2011-01-24 20:36 testfile I then added a user to that group ("/etc/group" has ...
1
vote
2answers
283 views

Permissions with writing NTFS partition from Windows

I mounted my NTFS external hard disk to my Pi this afternoon, my /etc/fstab currently looks like this (I encourage any recommendations or queries made on the properties made, especially the umask - ...
2
votes
1answer
20 views

Desktop app run by admin user (but not explicitly with sudo) takes file ownership of shared file

Similar to http://stackoverflow.com/questions/15143614/file-ownership-changes-to-root-after-saving-from-a-program-in-ubuntu but I can't use the answer since I'm not running a command-line app as sudo. ...
1
vote
1answer
41 views

sudo chown -R $USER:admin /usr/local - revert back to ROOT?

On OS X, but may also apply to *NIX. This question was asked/answered previously, and I know it's safe to chown on /usr/local for my admin user account, which I've done to install git with homebrew ...
1
vote
1answer
37 views

How can I tell why I have permissions to read a file? [closed]

Here's what I just noticed on my CentOS SSH account: stat output $ stat /dev/kvm File: `/dev/kvm' Size: 0 Blocks: 0 IO Block: 4096 character special file Device: ...
1
vote
0answers
35 views

Permission denied when running logrotate with anacron

I am trying to figure out what is causing anacron to send me the following error message: /etc/cron.daily/logrotate: /var/log/mariadb/mariadb.log-20140710.gz: Permission denied error: error running ...
0
votes
1answer
25 views

Symbolic link permission changes [duplicate]

I would like to change the symbolic permission[lrwxrwxrwx] to 755. I've used the command to try and change the permissions and it's not working. $ chmod -R 755 symbolic link folder
-1
votes
1answer
37 views

How do I properly allow user jenkins to write to a specific directory under user minecraft home directory?

I am using Jenkins, I want to copy a file from the Jenkins directory in to the minecraft user directory, but I am not sure how to go about this, as when I run cp build/versions/*.info ...
0
votes
0answers
17 views

server migration experiments

At our premise, we are going to have to migrate some servers. I'm making some experiments for try to make all the silly stuff before put hands on real servers. I got 2 raspberry Pi, installed ...
3
votes
1answer
209 views

What permissions do I need to write to a card reader?

I have a card reader attached on /dev/sdb. What I do is giving all permissions to owner, group and the rest of the world, using: sudo chmod 777 /dev/sdb Can I just use another combination, ...
4
votes
1answer
114 views

View List of Sudoers with No Sudo Priviledges

If I'm not a sudoer, is it possible to view the list sudoers? Does /etc/group show this information?
5
votes
2answers
136 views

Why ssh-agent group ownership is not root

Trying to understand why ssh-agent has sgid bit and found this post ssh-agent has sgid I have another question, why the group ownership of ssh-agent is nobody not root? What is the reason behind it? ...
6
votes
5answers
22k views

Problem to launch java at Debian: “error while loading shared libraries: libjli.so”

I'm trying to launch java: $ java -version java: error while loading shared libraries: libjli.so: cannot open shared object file: No such file or directory $ ldd ...
0
votes
1answer
847 views

FTP error 553could not create file in RHEL

We need to transfer a file from local machine to remote machine. Remote machines settings is as below: [540607@hsldevoradb ~]$ su - Saphr002 Password: [Saphr002@hsldevoradb ~]$ pwd /odi/CSV/in ...
1
vote
1answer
510 views

Create / Edit files in specific folder using different user / group

I want to know if the following scenario is possible. I am a user called www-admin and I am in the group www-admin. I am also a sudoer. I want to have all the files I create in the folder ...
6
votes
2answers
104 views

Why do some applications stop working when permissions are changed in /usr/bin?

On OS X, a friend of mine changed the permissions on /usr/bin recursively using Finder, in order to grand write access to everyone. Here is how it's done: Go to /usr/bin in Finder, then mess with ...
2
votes
1answer
2k views

How can ubuntu/truecrypt be configured so users can mount volumes if-and-only-if they have proper permissions on the mount-point?

If I add the line: ALL= /usr/bin/truecrypt to the sudoers file this lets all users mount volumes at arbitrary mount-points. The problem is a user could create a truecrypt volume and then mount it at ...
5
votes
4answers
1k views

Selinux is denying access to mysqld

I have a script that dumps a mysql database. It then compresses the file and this gets stored in my home folder by using cron. The problem is I seem to be getting an error message. mysqldump: ...
3
votes
1answer
67 views

How to ignore -ls errors in find

I'm writing a find command to look for files or folders with broken permissions (files should be rw, directories rwx) and trying to ls -l (give or take) the results. The following find command looks ...
4
votes
1answer
109 views

chmod doesn't work on folder 'd — — ---' permissions

In /var/www I've got a folder: d--------- 2 www-data www-data 4096 May 20 2012 update reported by ls -la. I'm logged in as root, but I can't change permissions or ownership. chown and chmod ...
0
votes
1answer
32 views

Is it viable to have a file with 700 permissions?

I have been wondering about the following thing: Consider Pc A. Pc A has n users. There is a folder with one file per user. There is some sensitive information for each usere there, so you don't ...
4
votes
2answers
61 views

777'd some files. How do I repair SSH?

So I'm messing around on a test server and accidentally ran the following (which resulting in SSH breaking): # chmod -R 777 /var Because it's a test server, I'd rather not re-install right now, I ...
2
votes
1answer
813 views

Zabbix-agent: cannot stat 'filename.log': [13] Permission denied

I have installed Zabbix-server and zabbix-agent and trying to add trigger to check log file. But in /var/log/zabbix/zabbix_agentd.log I got the same error every time: 10832:20131008:125634.180 ...
2
votes
1answer
34 views

Copy file from USB drive to a desktop loaded via a LiveCD

I have booted my computer using a LiveCD and want to copy a file from a USB drive to the LiveCD loaded desktop. I want to copy a file from the USB drive to the desktop environment in memory, which ...
1
vote
0answers
59 views

Limit program execution to a list of arguments

I would like that my Unix users can only run a specific command insecurecommand with a controlled list of arguments stored in a file. The only solution I have found at this time is to : Create a ...
3
votes
2answers
2k views

“echo 3 > /proc/sys/vm/drop_caches” - Permission denied as root

I am currently having some issues with the cache. It is a little too much right now so I wanted to clear it. I googled and found this little command: sync && echo 3 > ...
4
votes
1answer
697 views

Using setfacl to create recursive permissions for Apache with rsync

I have a Dokuwiki installation locally, which I regularly sync to my server with rsync. I'm also going to give a friend of mine an ssh account, and host his public Dokuwiki installation. However, I'm ...