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
votes
2answers
103 views

Preserve ownership with rsync and nonexistent user

I have two computers with the same user, me@Home and me@Work. I usually kept their folders synced by bringing Work home (it's a laptop) and rsyncing over LAN. However, now I'm not bringing Work home ...
3
votes
1answer
229 views

Move preserves ownership of source files not allowing writes

Kindly Consider: $ id # Me uid=100(user1) gid=200(group1) groups=200(group1) $ ls -l tnsnames.ora # So user1 has only read permission on below file. -rw-rw-r-- 1 oracle dba 411024 Jul 28 2010 ...
0
votes
0answers
134 views

CPU Frequency Scaling Monitor: No passwd, all cores at once

I use MATE 1.6.2 and CPU Frequency Scaling Monitor 1.6.2. I would like two things: Get rid of the need of the root password to change the CPU settings. To affect all cores at once. The problem is ...
3
votes
2answers
162 views

Cannot delete File on Fedora

I have a file with following permission: -rwSr-s---. 1 1634630331 1818884080 118784 Jun 29 1970 DailyUpdateClass.class If I try to delete this file with root login, I get error. rm: cannot remove ...
2
votes
0answers
117 views

Logrotate no longer reads symlinked configuration file due to non-root ownership

We are currently upgrading from Ubuntu 12.04 LTS to 14.04 LTS on our ruby on rails application servers, and have noticed that the log files are no longer rotating. On both machines we have a file ...
3
votes
1answer
55 views

Why does `mkdir -pm` not set the permissions I asked for?

I created some directories with the command mkdir -pm 700 /tmp/a/b/c I was surprised to find that /tmp/a had permissions 775 rather than the 700, I had requested. Is there some reason for mkdir to ...
2
votes
1answer
120 views

What privileges are needed to delete a read-only btrfs subvolume?

I want to delegate non-root user to delete read-only subvolumes (snapshots). What exactly capabilities/rights I need to grant, so that he can remove his own read-only snapshots? I've already ...
2
votes
3answers
1k views

How to remount as read-write a specific mount of device?

How to remount as read-write a specific mount of device? (one folder) The file is "Read-only file system", rw-r-r, so it not allow to change permissions. I need to replace that file, then change ...
6
votes
2answers
135 views

Folder with ONLY write permission is useless… right?

Having worked with Linux for years, and finding myself with some free time, I decided to revisit some basics. So I re-read the stuff about permissions (without checking source code), and its special ...
1
vote
2answers
39 views

How would you assign read-only permissions to run ls -l /proc/{pid}/fd for processes you don't own

How would you assign read-only permissions to run ls -l /proc/{PID}/fd for PIDs (processes) you running as another user. Ideally, you wouldn't be able to do anything else and you would not have ...
1
vote
1answer
172 views

Why do I get “Permission denied” when redirecting the output of sudo echo “xyz” to a file? [duplicate]

Why do I get -bash: test: Permission denied when I run sudo echo "xyz" > test The directory permissions are: drwxr-xr-x 3 root root 4096 2014-08-05 16:26 I have no problem creating a ...
3
votes
1answer
71 views

How to set special folder permission on proFTPD?

On one of my servers, I have ProFTPD installed in Debian 7. I need special permission only for 2 specific folders. These are: append - user must be able to append data to an existing file rename - ...
3
votes
1answer
353 views

Force new permissions on files after rsync from seedbox

I have a seedbox-account which I use for torrenting. I have set up a cron job that uses rsync to download all files from the seedbox to my 14.04.1 ubuntu server. The download folder is a samba share, ...
1
vote
2answers
342 views

Cannot edit crontab as non root user

When I use the command crontab -e on my Debian server as a non root user (in this case as postgres), I can't edit it because of "/tmp/crontab.SJlY0Y/crontab" [Permission Denied] crontab -l on the ...
1
vote
1answer
328 views

how to make logstash read kannel log

I got logstash installed on ubuntu 12.04 using the apt repository. But logstash is not reading any document. In logstash log there are teh following: ...
0
votes
1answer
89 views

How do I delete a file in a read-only directory?

I've got a directory and a file in it, with the directory marked as read-only: $ mkdir directoryname $ touch directoryname/filename $ chmod a-w directoryname I cannot delete the file, even if pass ...
2
votes
1answer
122 views

What relationships do tie ACL mask and standard group permission on a file?

At first I create a file and check it's standard permissions and ACL entries: $ touch file; ls -l file; getfacl file -rw-r--r-- 1 user user 0 Jul 30 16:26 file # file: file # owner: user # group: ...
2
votes
1answer
85 views

How can I set device rw permissions permanetnly on raspbian?

Im using Raspbian (distribution made for Raspberry Pi based on Debian). I have some scripts that use i2c. Normally only root has read and write permissions for i2c. Im using this command to add i2c ...
0
votes
1answer
246 views

Debian file's permissions for secondary's group of user

I am installing a proftpd server on a debian dedicated server, In order to be able to update some website files in this folder : /var/www/website I have added a new user : my-ftp-user This user's ...
-1
votes
1answer
22 views

A command showing if I have the right to perform writing?

I'm searching for a command which only says if the current user has r-rights (read) on the file passed as a parameter. This command could be something like haveIRights -x <file> and it has to ...
12
votes
4answers
2k views

How does the OS know that a command needs sudo?

When you run an executable, sometimes the OS will deny your permission to. For example running make install with the prefix being a system path will need sudo, while with the prefix being a ...
1
vote
2answers
194 views

relation between chmod and sudo on an executable file

What is the relationship between chmod and sudo on an executable file for a user? Are the cases that "a user needs sudo to run an executable" the same as the cases that "chmod hasn't set the ...
-3
votes
2answers
62 views

How do I run as a limited user while logged in as Root, and another question

Is there a way to, on linux, do: run as limited user when logged in as root? (like sudo but vice versa, so instead of GRANTING rights, it limits them, i.e., for use with "bundle install" for missing ...
4
votes
2answers
334 views

Should /usr owner be root?

After having installed the MySQL database on openSUSE I realized that for all files in /usr/bin the owner was changed to the "mysql" user of the "mysql" group. Maybe there was some mistake of mine. ...
1
vote
1answer
129 views

How to disable local file writes?

I maintain a shared public computer. Every user has their own directory in /home. We don't like to make /home a network mount because it takes a long time for new users to login, but we would like to ...
0
votes
2answers
2k views

-bash: /dev/null: Permission denied

I'm trying to create a new user on a Centos 6 system. First, I do useradd kevin Then, I tried to run commands as that user su - kevin However, I get the following error messages -bash: ...
1
vote
1answer
59 views

How can a permission a directory so that a user can list the contents, but cannot read them

I am setting up a vstpd FTP server where people can upload files to be processed. I want them to be able to write and see the list of files, but not actually download them. I'm using virtual users ...
1
vote
2answers
97 views

Unable to get rid of root user and privileges

I am told that the most basic security to set up in Linux is to change the superuser name from root to something obscure so I run these steps to add new user $ /usr/sbin/adduser new_username $ ...
1
vote
2answers
1k views

-bash: cd: .ssh/: Permission denied

When I type in cd .ssh in terminal, it returns with -bash: cd: .ssh/: Permission denied. Now I cannot add my ssh keys to ssh. When I type ssh-add ~/.ssh/idname it says /Users/Dan/.ssh/idname: ...
1
vote
1answer
57 views

Give a user the permission to access files in a directory

I have mounted a volume from NAS storage to my Solaris 10 machine using NFS. I want to give read/write permission for a user to the directories and subdirectories and files. I have tried setfacl -m ...
2
votes
1answer
175 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 ...
0
votes
2answers
159 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 ...
2
votes
1answer
89 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 ...
3
votes
1answer
347 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: ...
3
votes
1answer
307 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 ...
2
votes
1answer
439 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: ...
0
votes
0answers
86 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 ...
1
vote
3answers
218 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 ...
1
vote
1answer
315 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 ...
2
votes
1answer
184 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’: ...
4
votes
1answer
607 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 ...
2
votes
1answer
34 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
124 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: ...
0
votes
1answer
111 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
vote
0answers
220 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 ...
1
vote
1answer
444 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 ...
0
votes
0answers
27 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 ...
4
votes
1answer
264 views

Give a specific user permissions to a device without giving access to other users

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, ...
-1
votes
1answer
1k 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 ...
5
votes
2answers
212 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? ...