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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173 views

write only permissions on samba

I am busy setting up a file server in our church office (using samba on a debian machine). I would like to impliment a dropbox-like folder for each user, where othere users may deposit files. ...
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7answers
1k views

Convert ls -l output format to chmod format

Say I have the following output from ls -l: drwxr-xr-x 2 root root 4096 Apr 7 17:21 foo How can I automatically convert this to the format used by chmod? For example: $ echo drwxr-xr-x | ...
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2answers
396 views

How do I make PHP securely load files from the server root home folder on CentOS?

So I built what I thought would be this awesome reporting page in PHP that loads data from some CSV text files and creates nice Google charts and tables for our clients. I then thought it would be ...
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0answers
201 views

Apache created files and its permissions for CentOS 6.x

In short, I have an authenticated HTTP-POST that: posts a jpg image (created as 666 apache:www) into /directory1 (777 ftpuser:www) creates /directory2 (created as 666 apache:www) in a 777 ...
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2answers
289 views

A service is failing to start on permissions denied--which files is it failing on?

I'm attempting to start a service that our company created. In one particular environment, it's failing to start on three "permission denied" errors. I'm not sure which files it is failing on, so I ...
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2answers
127 views

Files created by 'make' aren't getting executable permissions by default

I'm trying to build a project, and when I use the command make, I get the following errors: /bin/sh: line 4: .deps/ipset_bitmap_ipmac.Tpo: Permission denied make[2]: *** [ipset_bitmap_ipmac.lo] Error ...
3
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1answer
59 views

Copy file permissions from user to group

I have a folder with some files, which each have different permissions. Some are read-only, some are read/write, some are read/execute. How can I copy the permissions from user to group, so that for ...
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1answer
104 views

Able to delete file without permission [duplicate]

I've been experimenting with file permissions and ownership lately, and I tried this: touch a sudo chown root:root a sudo chmod 000 a I can't read, write, or execute the file, but I can still ...
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1answer
104 views

View temporary files which exist for milliseconds

I'm trying to debug a program which is not logging the information I need. Fortunately, it does write temporary files which should contain the information. These files are written to a directory like: ...
3
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1answer
205 views

File owner must belong to file group?

I have a rather simplistic understanding of file permissions on *nix systems. I understand that there is a file owner and file group, but is there a hard and fast rule on whether the said file owner ...
1
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3answers
131 views

Taking away a User's Read/Write/Execute Permission

So I have a user that is able to go in /etc and read files like httpd.conf. I would like to deny that user access to any critical locations such as /etc, /var and so on. What would be the best way ...
1
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1answer
108 views

backup / on ntfs filesystem encrypted

I was about to backup my archlinux, following this guide to my FritzBox, (which enforces a NTFS system that I mounted via samba) as I remembered, that NTFS is not capable to keep permissions and other ...
3
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2answers
171 views

Running user script with root permissions

I have a script that I've made that needs to have root permissions to enable and disable bluetooth features. I am binding this to a button so it is not feasible to log in as root to run the script. ...
6
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1answer
106 views

Setting permissions for specific programs to run as guest

How do I set permissions for an HTTP server (nodejs) to run programs in /usr/local/share/npm/ safely? My use case is to setup my OSX box to run cloud9 and use titanium to build iOS apps for ...
3
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2answers
1k views

SELinux: Can I disable copying of certain files?

Please excuse me if this is too basic and you're tempted to throw an RTFM at me. I want to prevent users from copying certain files while granting them read access to the same files. I thought this ...
3
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2answers
404 views

How to set permissions in /sys/ permanent?

I'm starting X as a user and need to set my keyboard brightness in /sys/class/leds/asus\:\:kbd_backlight/brightness. The /sys/ directory gets recreated after reboot, so the permissions will reset too. ...
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1answer
75 views

Function of owning group versus ACL group permissions

Given the fact that we can give any number of groups rwx via POSIX ACL's is there any special privileges given to the owning group? For example, we can set any number of users with ACL's but only the ...
4
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2answers
141 views

How to run script with the privileges expected of the script's general “intended user”?

During the development of a script, some bugs remain "latent" until the script is run by a different user. (For example, the script may access a file that only the person developing the script has ...
2
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1answer
2k views

script failing with “chmod: … Operation not permitted”

A script of mine works fine when I run it, but fails when run by a different user, with an error of the form chmod: changing permissions of `/A/B/C/D/E': Operation not permitted (Here /A/B/C/D/E is ...
2
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2answers
563 views

Taking file ownership when file and directory is readable/writable

I got some files in directory: drwxrws-wt 2 me mygroup 4,0K 10.1. 12:34 . -rw-r----- 1 someone mygroup 10G 10.1. 11:22 someonesfile me and someone are regular users without supplementary ...
1
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2answers
275 views

Cannot access any files Manjaro Linux

I cannot open any files on my Manjaro Linux laptop. I really can't remember why it happened but I restarted my computer and now I dont have read/write access to any folder or file even though I've ...
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2answers
210 views

A bunch of files have 777 permissions

I have been learning Python and Bash scripting, and I up to now I have given my scripts 777 permissions. Having learned more about how to set permissions, and knowing this is a bad idea, I ran the ...
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2answers
9k views

Mount cifs Network Drive: write permissions and chown

I have access to a cifs network drive. When I mount it under my OSX machine, I can read and write from and to it. When I mount the drive in ubuntu, using: sudo mount -t cifs -o ...
3
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1answer
157 views

Redirecting output in the shell, permissions

I have a question about permissions. Distro: Debian GNU/Linux 6.0.4 (squeeze) So I have a folder with a php script in it. Both folder and file are owned by User1 If I do this: php script.php I ...
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1answer
2k views

Why useradd shows Permission denied error

I am working on CentOS 5.5. When I run the useradd command as root, then its working. But when I run the same command from one of the user, then it shows -bash: /usr/sbin/useradd: Permission ...
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5answers
416 views

How do I disable copy permissions?

Can we set permissions, on a Linux box OR for a particular directory (Scientific Linux in my case) that, one can read files but cannot copy, move or delete them? Update: My Scenario is, We developed ...
2
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1answer
1k views

Why can't I use strace with rsh?

If I run rsh, it works, but prints some strange “Connection refused” messages at the beginning: $ rsh localhost pwd connect to address 127.0.0.1 port 544: Connection refused Trying krb4 rsh... ...
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1answer
656 views

How to suid iwconfig on Debian wheezy?

I have a script running under my own user account that takes care of all sorts of wireless interfaces. It (more or less) intelligently switches wireless LAN off and on and so forth. However, it does ...
19
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2answers
1k views

How do I make a file NOT modifiable?

While logged in, I can do the following: mkdir foo touch foo/bar chmod 400 foo/bar chmod 500 foo Then I can open vim (not as root), edit bar, force a write with w!, and the file is modified! How ...
0
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1answer
565 views

Setting permissions with FTP

I'm having some issues setting up permissions for FTP. Read another thread on here regarding it, but I wasn't sure if it really matched what I needed. Essentially, right now I've got the client's FTP ...
3
votes
2answers
512 views

How do I create a hierarchy of UNIX groups as below?

I need to create a hierarchy of UNIX groups. Something like below: A |\ | \ B c |\ D e |\ f g ...where A, B and D are UNIX groups and c,e,f and g are UNIX accounts that are members of those ...
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2answers
297 views

How to make a path world-readable?

To make some item X world-readable, it is not enough for it to have the right permissions: each component of the absolute path leading to it must also have the right permissions. (My understanding, ...
5
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1answer
550 views

Is it possible to disable file permissions on a ext3 or ext4 file-system?

Is it possible to disable file permissions on an ext3/4 file-system? Just wondering if it's possible to completely disable or ignore file permissions on a ext3 or ext4 file system. Perhaps a mounting ...
0
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3answers
491 views

Why is umask setting a different permission for a directory and file I have created?

Consider: [user@server1 ~]$ umask 0770 [user@server1 ~]$ mkdir TEST2; touch TEST2.txt; [user@server1 ~]$ ls -l d------rwx 2 user group_name 4096 Mar 5 05:16 TEST2 -------rw- 1 user group_name 0 ...
2
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1answer
192 views

How to set up a script to run as root non-interactively?

I need to set up the following script to run as root whenever I log in: #!/bin/zsh truncate -s 0 ~yourstruly/.juniper_networks/network_connect/ncsvc.log I know how to run the script as root ...
1
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0answers
310 views

Network Manager don't show me Wireless connection

I've just installed on my Debian Sid with XFCE4 network manager, but I have a problem, no wireless connection are shown. What Should I do? I used to use wicd but I had problems to connect to free ...
2
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3answers
269 views

How does gcc handle file permissions?

The executable files that gcc creates have execution permissions -rwxrwxr-x which are different than the permissions that the source file has. -rw-rw-r-- How does gcc set these permissions ?
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1answer
552 views

Allow all group members to create directories and files

There are 2 users sftp_user apache Both users belong to the updaters group as well as other groups. New directories and files are created in the /updates/ directory. drwxrwsr-x 8 sftp updaters ...
2
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1answer
1k views

How do I mount an NTFS partition in /etc/fstab and prevent files/directories from receiving exec permissions when they're created?

I have an NTFS partition that I want to mount using /etc/fstab. I don't want any files to have executable permissions on this drive, so I wrote the following rule: /dev/sda2 /media/sharedfolder ntfs ...
1
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0answers
39 views

Existing file can not be found? [duplicate]

/usr/share/tipp10$ ll insgesamt 9408 drwxr-xr-x 3 myname ssl-cert 4096 Feb 26 20:07 ./ drwxr-xr-x 288 root root 12288 Feb 26 20:07 ../ -rwxrwxrwx 1 myname ssl-cert 9480 Okt 6 2010 ...
1
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2answers
113 views

run a command as different user with available sudo permissions

I want to run the below command echo 1000 > /sys/class/backlight/intel_backlight/brightness i cannot do it it like below beecause bash is the process that actually directs output to the ...
1
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1answer
279 views

Having owner access on files upon mounted NFS directory

I have a Linux RedHat server and a Solaris 10 client. I have mounted a directory which locates on the RedHat server, in the Solaris system with RW(read/write) option. I already have some directories ...
2
votes
2answers
482 views

setfacl incorrectly changes group permissions

To backup the "/home" directory tree of a server, I've created a 'backup' account and used setfacl to make the whole directory readable by it. My cron job runs this command as root each night: ...
0
votes
1answer
1k views

Cannot execute binary file on Mac OS X Lion 10.7.5

I want to execute phylocon on a mac OS X lion but after changing the path and making the file executable, I get the error 'cannot execute binary file'. But the steps that I took to running the command ...
1
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1answer
543 views

File is readable by everyone, but I can't open the file

I'm fairly new to Unix and I have written a script: SERVER="/usr/local/abc/.../somefile.txt" OPTION="$1" if [ x$OPTION = "xtitle" ] then grep $OPTION $SERVER exit fi As far as I ...
2
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0answers
95 views

Problem with encrypting /var/www and ikiwiki

I tried to encrypt /var/www with encfs. To do so I did following: mv /var/www /var/www.bak mkdir /var/www_enc encfs --public /var/www_enc /var/www cp -a /var/www.bak/* /var/www/ /etc/init.d/apache2 ...
2
votes
1answer
324 views

Properly Set Permission to /home/user folder for webserver

I'm currently setting up my own Linux server running CentOs 6. To test the security on my server I wrote a PHP script that acts like a sort of "navigator". I can go one directory up, open the files, ...
1
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0answers
121 views

External HDD read/write permission changing from a cron job

So, I run an overnight python script that runs a backup of our web data in the /var/www directory, then moves the backups to an external HDD in /media. The script in scheduled in the sudo crontab ...
0
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1answer
33 views

A user in a group does not have group access?

I have a fresh install of ubuntu server 12.10. I have created a group called www-dev and a user called dab. the user is in the group and i can verify that by members www-dev which returns dab. I ...
2
votes
2answers
303 views

cannot touch -m a writable file

Can someone explain why I get permission denied when running touch -m on this file even though it is group writable and I can write to the file fine. ~/test1-> id uid=1000(plyons) gid=1000(plyons) ...