The only thing is - the new environment variables were only available to my current user - and were ignored when I used sudo. They only became available to sudo when I closed my terminal session and rejoined.
Is there a simple way to load in the new bash profile settings for sudo without having to close the terminal and restart? I found that while they could access the variables when I called the scripts directly although, this would cause a later problem with creating directories as I needed to be rootcalling the install scripts using sudo wouldn't. The problem is that source is a bash build-in command not a program - like ls or grep. I think one approach is to login as root and then execute the source command.
The problem is not that source is a shell builtin command. The fact that it is is what's actually throwing you the command not found error, but it doesn't mean it would work if it were. The actual problem is how environment variables work. And they work like this: every time a new process is started, if nothing happens, it inherits the environment of its parent. Due to this, using a subshell e. Doing something like sudo source script.Sommario.
As Marcos saysyour main problem here is that source is a shell builtin command that affects only the shell process in which it's run. That's as simple as just saying. Using bash process substitution you can do:. Closing and reopening the terminal should not change things.
By default, sudo strips the environment. To disable that, add -E to sudo. The error happens because the binary you are trying to call from command line is only part of the current user's PATH variable, but not a part of root user's PATH.
You can verify this by locating the path of the binary you are trying to access. In my case I was trying to call "bettercap-ng". So I ran. So sudo cannot find the binary that I am trying to call from commandline.
Hence returns the error command not found. Some UNIX shell does not support source. So try this. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. Asked 9 years, 3 months ago.
It only takes a minute to sign up. I tried to use su instead of sudo. But it is strange. For example I print su apt-get update And nothing happens I just see a new line. By default sudo is not installed on Debian, but you can install it. First enable su-mode: su.
After that you would need to play around with users and permissions. Give sudo right to your own user. Make sure your sudoers file have sudo group added.
Run: visudo to modify sudoers file and add following line into it if it is missing :. Since it's a commercial server you won't have access to root account nor be able to operate with root privileges. This means you won't be able to run sudo nor install packages. What you can try to do is:. Check if you have access to a compiler and compile what you want for yourself and in your home space. Check if you can run a virtual machine.
This might let you run your private instance of an OS, on which you would install packages. It is unusual for sudo not to be installed, but it may simply not be in your Path. If indeed sudo is not available, you need as you surmised to use subut it does not work in the same way as sudo.
The simplest way to use it is to simply run:. This will ask you for the root user's password, at which point you should probably apt install sudolog out of the root shell, and then proceed as normal.
Mind that unlike sudowhich asks you for your password, su will ask you for root 's password. Sign up to join this community. The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. Asked 3 years ago. Active 6 months ago. Viewed k times. I am trying to deploy django app. When I print sudo apt-get update I see -bash: sudo: command not found I tried to use su instead of sudo.
[mininet-discuss] command not found
What do I do? Is this a customer account on a commercial server? If you don't own the server, what made you think you have the right to install or remove software? What happens if you run apt-cache policy sudo? Not all Linux distros install sudo by default Debian, for instance, will install sudo if and only if you don't specify a root password on installation. You can run apt-cache without root privileges.September 13, 6 Comments.
I ran into many issues trying to get OVS installed and running. I had to set SELinux to Passive to work around it.
Somewhere around line May differ. Not OVS. The kernel datapath is not installed. This is totally userspace. I could not get the kernel module to compile. Wait until official support of RHEL7. The above is the extent of the testing I did. There may be other issues that crop up. Is OVS running? There should be 2 OVS processes running all the time. I should probably do a followup to this article. This was written when I could not find any OVS packages.
This is probably the preferred method for OVS now. I followed the steps u made it here. You are commenting using your WordPress. You are commenting using your Google account. You are commenting using your Twitter account.This document is meant to give you a brief sense of what Mininet is and how it works, including a basic introduction to Mininet's Python API, the core of Mininet's functionality that you will usually want to use to create networks and run experiments.
Mininet is a network emulatoror perhaps more precisely a network emulation orchestration system. It runs a collection of end-hosts, switches, routers, and links on a single Linux kernel. It uses lightweight virtualization to make a single system look like a complete network, running the same kernel, system, and user code.
A Mininet host behaves just like a real machine; you can ssh into it if you start up sshd and bridge the network to your host and run arbitrary programs including anything that is installed on the underlying Linux system.
The programs you run can send packets through what seems like a real Ethernet interface, with a given link speed and delay. Packets get processed by what looks like a real Ethernet switch, router, or middlebox, with a given amount of queueing.
When two programs, like an iperf client and server, communicate through Mininet, the measured performance should match that of two slower native machines. In short, Mininet's virtual hosts, switches, links, and controllers are the real thing — they are just created using software rather than hardware — and for the most part their behavior is similar to discrete hardware elements.
It is usually possible to create a Mininet network that resembles a hardware network, or a hardware network that resembles a Mininet network, and to run the same binary code and applications on either platform.
It's fast - starting up a simple network takes just a few seconds. This means that your run-edit-debug loop can be very quick.
You can create custom topologies : a single switch, larger Internet-like topologies, the Stanford backbone, a data center, or anything else.Delphi ds150e software installation
You can run real programs : anything that runs on Linux is available for you to run, from web servers to TCP window monitoring tools to Wireshark. You can customize packet forwarding : Mininet's switches are programmable using the OpenFlow protocol. Custom Software-Defined Network designs that run in Mininet can easily be transferred to hardware OpenFlow switches for line-rate packet forwarding.
Amazon EC2. You can share and replicate results : anyone with a computer can run your code once you've packaged it up. You can use it easily : you can create and run Mininet experiments by writing simple or complex if necessary Python scripts. You may also edit this documentation to fix any errors or add clarifications or additional information.
Mininet is under active development. So, if it sucks, doesn't make sense, or doesn't work for some reason, please let us know on mininet-discuss and the Mininet user and developer community can try to explain it, fix it, or help you fix it.
Running on a single system is convenient, but it imposes resource limits: if your server has 3 GHz of CPU and can switch about 10 Gbps of simulated traffic, those resources will need to be balanced and shared among your virtual hosts and switches. Mininet uses a single Linux kernel for all virtual hosts; this means that you can't run software that depends on BSD, Windows, or other operating system kernels. Although you can attach VMs to Mininet. Mininet won't write your OpenFlow controller for you; if you need custom routing or switching behavior, you will need to find or develop a controller with the features you require.
By default your Mininet network is isolated from your LAN and from the internet - this is usually a good thing! Note the bind. Unlike a simulator, Mininet doesn't have a strong notion of virtual time; this means that timing measurements will be based on real time, and that faster-than-real-time results e.
It only takes a minute to sign up. Your sudo doesn't have the setuid flag. To solve this, run the following command in terminal:.Hehr 8700 series
Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Sudo is not working Ask Question. Asked 6 years, 6 months ago. Active 6 years, 6 months ago. Viewed 5k times. My sudo is not working. How to fix? I am using I searched through google over an hour and haven't found anything effective. Is this a fresh install? It happened today. If it's a fresh install install it again. Might be the fastest and cleanest way We need more information to help you. If its a new install or you have everything backed up so would not lose anything by reinstalling.
I'd reinstall probably the quickest solution. If not then can you edit the question to let us know what if any changes you made prior to it going wrong.Adobe reader for computer
Also include the output of id and details of any warning messages or errors you have seen. Active Oldest Votes. Try now. You can run this command from a LiveCD that actually has a working sudo command.
In order to fully understand Linux file permissions you can study the documentation for the chmod command. To read the chmod documentation for your local systemrun man chmod or info chmod from the command line.
Once read and understood you should be able to understand the output of running Here's a summary of how to troubleshoot the Permission Denied error in your case. The chmod command fixes that. Group and other only have read permission set on the file, they cannot write to it or execute it. When you run a command using sudo you are effectively running it as the superuser or root.
The reason that the root user is not finding your command is likely that the PATH environment variable for root does not include the directory where foo. Hence the command is not found. The PATH environment variable contains a list of directories which are searched for commands. Each user sets their own PATH variable according to their needs. To see what it is set to run. Here's some sample output of running the above env command first as an ordinary user and then as the root user using sudo.
Note that, although similar, in this case the directories contained in the PATH the non-privileged user rkielty and the super user are not the same. The directory where foo. It's also possible to name the alias itself sudoreplacing the original sudo. It'll then be available to the sudo. Have a look at this answer to have an idea of which directory to put soft link in.Webchatworld
It seems that linux will say "command not found" even if you explicitly give the path to the file. It's a somewhat misleading error, however it's probably technically correct.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. So I can't continue using the SDN network!
How can it be fixed manually and why this error happens! I had the exact same problem when I upgraded to Open vSwitch 2. I also found test-controller under.
What You Should Know About the Sudo Command
I'm using Mininet 2. Here's the output:. It's interesting that they discourage the use of test-controllerand even more so that Mininet seems to rely on it. Perhaps there is a better executable for this purpose? As pointer by csl above, You have to install openvswitch controller separately. In ubuntu that's what worked for me:. A cleaner way to install would have been to use the Ubuntu package upgrades. This would make future upgrades of OVS and removal easier.
If you you installed Open vSwitch from source and want to remove it, then just go back to the source directory and run 'make uninstall'. BTW, I have found that if you didn't have an installation of Open vSwitch on your system prior to installing from source, Open vSwitch installation would not include the system startup scripts, so you would have to install them manually.
It's best to try and install Open vSwtich using packaging scripts. Learn more. Asked 6 years, 2 months ago. Active 3 years, 7 months ago. Viewed 10k times.
Charles Milson Milson 1, 3 3 gold badges 11 11 silver badges 26 26 bronze badges. Which version of Mininet and Open vSwitch are you using?
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