Ubuntu

问题 I am trying to open up port on my Ubuntu machine to allow me to connect the Mongo using an external program. I ran this which is the command line to open a new port: sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT but when I ran this to check if the new rule was there... sudo netstat -ntlp | grep LISTEN ...the new port wasn't in the list - any ideas? 回答1: I think the mangodb instance was not started, apart from that , sudo netstat -ntlp | grep LISTEN gives the list ports that are active

问题 I am trying to open up port on my Ubuntu machine to allow me to connect the Mongo using an external program. I ran this which is the command line to open a new port: sudo iptables -A INPUT -p tcp --dport 27017 -j ACCEPT but when I ran this to check if the new rule was there... sudo netstat -ntlp | grep LISTEN ...the new port wasn't in the list - any ideas? 回答1: I think the mangodb instance was not started, apart from that , sudo netstat -ntlp | grep LISTEN gives the list ports that are active

问题 i want to install the drivers for u are u 4500, but it only can be compiled with old kernel versions (2.6 to 3.2) , can you help me to install the drivers on ubuntu with last kernel version. The sample application of fingerprint cant recognize the device. 回答1: I am not sure what problems you are having, but I could compile and install the driver under Ubuntu 18.04. I did get a few errors during compilation, which I fixed as follows: Error 1: /opt/DigitalPersona/urusdk-linux/Linux/drivers

问题 i want to install the drivers for u are u 4500, but it only can be compiled with old kernel versions (2.6 to 3.2) , can you help me to install the drivers on ubuntu with last kernel version. The sample application of fingerprint cant recognize the device. 回答1: I am not sure what problems you are having, but I could compile and install the driver under Ubuntu 18.04. I did get a few errors during compilation, which I fixed as follows: Error 1: /opt/DigitalPersona/urusdk-linux/Linux/drivers

问题 I am using ubuntu 16 and trying to set up spark cluster on my lan. I have managed to configure a spark master, and manage to connect a slave from the same machine and see it on localhost:8080 When i try to connect from another machine, problems start, i configured passwordless ssh as explained here when i try to connect to the master using start-slave.sh spark://master:port as explained here I am getting this error log I tried accesing the master using the local ip and the local name (i

问题 I am using ubuntu 16 and trying to set up spark cluster on my lan. I have managed to configure a spark master, and manage to connect a slave from the same machine and see it on localhost:8080 When i try to connect from another machine, problems start, i configured passwordless ssh as explained here when i try to connect to the master using start-slave.sh spark://master:port as explained here I am getting this error log I tried accesing the master using the local ip and the local name (i

问题 Trying to run RabbitMQ on VPS with Ubuntu 10.04. Doing everything like usual: added RabbitMQ deb repo updated with apt-get update installed with apt-get install rabbitmq-server On my local machine with Ubuntu 11.10 and another VPS with same 10.04 everything works just fine. But on this one i getting error like this (from /var/log/rabbitmq/startup_log): Activating RabbitMQ plugins ... ******************************************************************************** *****************************

问题 Trying to run RabbitMQ on VPS with Ubuntu 10.04. Doing everything like usual: added RabbitMQ deb repo updated with apt-get update installed with apt-get install rabbitmq-server On my local machine with Ubuntu 11.10 and another VPS with same 10.04 everything works just fine. But on this one i getting error like this (from /var/log/rabbitmq/startup_log): Activating RabbitMQ plugins ... ******************************************************************************** *****************************

问题 Tried installing urllib.request module using below command sudo pip install urllib.request but it returned Downloading/unpacking urllib.request Could not find any downloads that satisfy the requirement urllib.request Cleaning up... No distributions at all found for urllib.request Storing debug log for failure in /home/mounarajan/.pip/pip.log How can I install this module? 回答1: urllib.request is only available in python3 branch. See the following post for more info. urllib.request in Python 2

问题 Tried installing urllib.request module using below command sudo pip install urllib.request but it returned Downloading/unpacking urllib.request Could not find any downloads that satisfy the requirement urllib.request Cleaning up... No distributions at all found for urllib.request Storing debug log for failure in /home/mounarajan/.pip/pip.log How can I install this module? 回答1: urllib.request is only available in python3 branch. See the following post for more info. urllib.request in Python 2