Start the applications on Ubuntu

本文介绍了一种在Ubuntu系统上自动启动Nexus服务器的方法。通过编辑/etc/rc.local文件并添加Nexus启动命令,实现了系统启动时自动运行Nexus服务器。

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Start the applications on Ubuntu

These days I have installed nexus on my own computer.
Everytime, I need to execute this command to start my nexus server.
>./bin/jsw/linux-x86-32/nexus start

Now, I am thinking about one way to do it automatically.
>su root
>vi /etc/rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

/home/luohua/tools/nexus-oss-webapp-1.9.0.2/bin/jsw/linux-x86-32/nexus start

exit 0

save&quit, it will start my nexus automatically.

references:
http://www.linuxidc.com/Linux/2011-02/32242.htm
### Ubuntu Sniffer Network Monitoring Tool Installation and Usage #### Installing Sniffer Tools on Ubuntu To install a sniffer tool such as `tcpdump` or Wireshark on an Ubuntu system, one should follow specific procedures that ensure proper setup and functionality. For instance, installing `tcpdump`, which is a powerful command-line packet analyzer: ```bash sudo apt-get update sudo apt-get install tcpdump ``` This process ensures the latest updates are fetched before installing `tcpdump`. After installation, users can start capturing packets immediately by running commands like `sudo tcpdump -i eth0` where `-i eth0` specifies the interface to capture traffic from[^1]. For graphical interfaces, Wireshark offers more user-friendly features compared to `tcpdump`. To set up Wireshark on Ubuntu: ```bash sudo apt-get update sudo apt-get install wireshark ``` Post-installation, non-root users need permission adjustments to run Wireshark without sudo privileges due to security concerns about accessing raw sockets. #### Using Sniffer Tools Effectively Once installed, both `tcpdump` and Wireshark provide extensive capabilities for analyzing network traffic. Users may filter captured data based on various criteria including IP addresses, ports, protocols, etc., enhancing troubleshooting efficiency significantly. Filters within these applications allow precise control over what gets displayed during analysis sessions. Wireshark also supports plugins extending its core functionalities further into specialized areas of interest beyond basic sniffing operations. These extensions cater specifically towards deep protocol inspection tasks not covered natively out-of-the-box. #### Security Considerations When employing any type of sniffer utility, especially those capable of intercepting sensitive information traversing networks (like passwords), strict adherence to legal guidelines must be maintained at all times. Unauthorized access attempts could lead to severe penalties under applicable laws protecting privacy rights.
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