Cannot Open Serial Port Error Permission Denied
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Cannot Open /dev/ttyusb0 Permission Denied
ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a cannot open /dev/ttys0 permission denied question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask minicom cannot open dev tty8 permission denied a question Anybody can answer The best answers are voted up and rise to the top Serial port terminal > Cannot open /dev/ttyS0: Permission denied up vote 7 down vote favorite 3 I had Windows XP on this box and it failed.
Cannot Access /dev/ttyusb0' No Such File Or Directory
Thinking it was corrupted OS I tried to reinstall, and it failed. But then I tried to install Ubuntu, and I could not run it from the USB or from the HD. Did the mem test and found out one of my 512MB sticks (had 2) failed. I removed the bad one and was able to install Ubuntu but it was sluggish. I was trying to quickly setup my packet radio for Hurricane Sandy. Downloaded the Serial Port Terminal and was able to get
Ubuntu Serial Port Permission Denied
some use but the system kept locking up. So Installed Xubuntu next to it, planning on running out the next day to get RAM for the box. Put Xubuntu on and now I am getting the following error with serial port terminal.: Cannot open /dev/ttyS0: Permission denied I would like to be able to use serial port terminal, or equivalent with Xubuntu so I can use my kpc3 packet terminal, connect to the com port on the back of my computer. Any ideas? serial-port share|improve this question edited Aug 26 '13 at 3:33 Braiam 38.8k1693153 asked Oct 31 '12 at 18:03 Joe Reynolds 36112 add a comment| 3 Answers 3 active oldest votes up vote 15 down vote The tty devices belong to the "dialout" group, I suspect you are not a member of this group and hence are denied access to /dev/ttyS0, so you need to add yourself to that group. First check if you are a member of that group: groups ${USER} ..this will list all the groups you belong to. If you don't belong to the dialout grup then add yourself to it, for example: sudo gpasswd --add ${USER} dialout You then need to log out and log back in again for it to be effective. Then see if it fixes your problem. share|improve this answer edited Aug 22 '13 at 15:29 Lucas 252212 answered Oct 31 '12 at 19:48 Colin Ian King 7,3362033 add a comment| up vote 2 down vote Had a look around v
Assigned to Milestone gtkterm (Ubuntu) Edit Confirmed Undecided Unassigned Edit You need to log in to change this bug's status. Affecting: gtkterm (Ubuntu) Filed here by: jmr13031@gmail.com unable to open serial port putty ubuntu When: 2012-03-08 Confirmed: 2012-04-20 Target Distribution Baltix BOSS Juju Charms Collection Elbuntu
Ubuntu Dialout Group
Guadalinex Guadalinex Edu Kiwi Linux nUbuntu PLD Linux Tilix tuXlab Ubuntu Ubuntu Linaro Evaluation Build Ubuntu RTM Package /dev/ttyusb0 permission denied arduino (Find…) Project (Find…) Status Importance Confirmed Undecided Assigned to Nobody Me Comment on this change (optional) Email me about changes to this bug report Also affects project (?) Also affects http://askubuntu.com/questions/210177/serial-port-terminal-cannot-open-dev-ttys0-permission-denied distribution/package Nominate for series Bug Description OS: Ubuntu 12.04 LTS Beta 64 bit Program gtkterm Version 3.3.0 Expected: Under Ubuntu 11.10 I could just run gtkterm and select the "/dev" device as a standard user. Probelm : Gtkterm is not able to open the /dev devices. You have to open a shell and type "sudo gtkterm" to get it to work. https://bugs.launchpad.net/bugs/949597 See original description Add tags Tag help Whoopie (whoopie79) wrote on 2012-03-28: #1 Please check if you're are member of the dialout group. If not -> "sudo adduser YOUR_USER dialout" on the console Launchpad Janitor (janitor) wrote on 2012-04-20: #2 Status changed to 'Confirmed' because the bug affects multiple users. Changed in gtkterm (Ubuntu): status: New → Confirmed Tom (trsaunders) wrote on 2012-04-20: #3 I am having the same problem. Adding my user to dialout did not help. Of course I can create a udev rule for the device, but I didn't need to do this in previous versions of Ubuntu. fatih yucesoy (fyucesoy) on 2012-04-25 description: updated Wade Matthews (sungreentree) wrote on 2012-06-22: #4 Same: Last week I switched to Ubuntu 12.04 LTS 64 bit. Now my user can't access the serial ports. It affects not just gtkterm but other serial port programs as well. I didn't see this in prior Ubuntu versions. Adding my user to the dialout group made no difference. For now, I am running "sudo gtkterm" to get around psolyca (damien-gaignon) wrote on 2012-0
Get Kubuntu Get Xubuntu Get Lubuntu Get UbuntuStudio Get Mythbuntu Get Edubuntu Get Ubuntu-GNOME Get UbuntuKylin Ubuntu Code of Conduct Ubuntu Wiki Community Wiki Other Support Launchpad Answers Ubuntu IRC Support AskUbuntu Official Documentation https://ubuntuforums.org/showthread.php?t=2057487 User Documentation Social Media Facebook Twitter Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web http://unix.stackexchange.com/questions/114612/why-root-cant-open-pseudo-terminal-device-permission-denied Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Networking & Wireless [SOLVED] serial port terminal error Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report permission denied it, thanks ! Results 1 to 9 of 9 Thread: serial port terminal error Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode September 13th, 2012 #1 Abo El Nile View Profile View Forum Posts Private Message Spilled the Beans Join Date Dec 2011 Beans 14 serial port terminal error Hi ; i am using serial port terminal on ubuntu open serial port 12.4 LTS and it give this error " Cannot open /dev/ttyS0: Permission denied " hope that any one can help me to solve this error Thanks ; Adv Reply September 14th, 2012 #2 jonobr View Profile View Forum Posts Private Message Ubuntu Cappuccino Scuro Join Date Nov 2006 Location Craggy Island. BeansHidden! DistroUbuntu 10.04 Lucid Lynx Re: serial port terminal error Hello Check permissions Code: /dev/ttyS0 Post back or research what ownerships and permissions should be Cheers You can tell a man who boozes by the company he chooses, as the pig got up and slowly walked away. Adv Reply September 14th, 2012 #3 Lars Noodén View Profile View Forum Posts Private Message Visit Homepage Ubuntu Member Join Date Sep 2006 Beans 8,627 DistroUbuntu 14.04 Trusty Tahr group membership The devices ttyS* belong to the group, 'dialout' You might not be a member of the group 'dialout' Code: groups aboelnile If not you need to add yourself to the group. Code: sudo gpasswd --add aboelnile dialout Then log out and log back in again for the changes to take effect. sudoedit | about systemd Adv Reply September 14th, 2012 #4 Abo El Nile View Profile View Forum Posts Private Message Spilled the Beans Join Date Dec 2011 Beans
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Why root can't open pseudo terminal device? (permission denied) up vote 2 down vote favorite Using a non-root user, I'm creating a pseudo terminal with socat like this: socat -d -d PTY,link=$HOME/.wine/dosdevices/com1,raw,echo=0 PTY,link=/tmp/com1-pty,raw,echo=0 and I need a root application to open this /tmp/com1-pty. Any attempt to do this results in a permission denied and the following syslog message: Feb 10 17:21:06 ti0085 kernel: [ 590.692819] type=1702 audit(1392060065.998:1004788): op=follow_link action=denied pid=6091 comm="menu" path="/tmp/com1-pty" dev="sda1" ino=48758820 I have tried many things, including setting permissions for both /tmp/com1-pty and the device to witch it links to 777. Also I have added root to dialout group - even though I don't believe it would make any difference, for I would expect the root to be able to open anything. What I'm doing wrong? permissions serial-port pty share|improve this question edited Feb 14 '14 at 9:27 asked Feb 10 '14 at 19:59 Tarc 1516 That is like when you break a link, and try to edit it. Even as root, there's "permission denied". The kernel doesn't allow users to mess with the interns of the system so easily. I suspect your error message is the same kind of thing. –JMCF125 Feb 10 '14 at 20:09 Maybe, I didn't know about this broken link thing... But the interesting thing is that the dual scenario works. When I run socat as root, set the permissions to 777, and then run the apps as non-root, everything works