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How to Simulate a TCP/UDP Client Using Netcat
In this guide, we’ll introduce the client-server model and show you how to simulate a TCP/UDP client using a useful tool called Netcat – so you can establish connection using your computer’s own terminal. So,how does the client-server model work within the Internet of things? The client is the device that initiates communication. The server is Ubidots (or any other server connection), which will a
How To Upgrade to Ubuntu 16.04 LTS | DigitalOcean
Warning: As with almost any upgrade between major releases of an operating system, this process carries an inherent risk of failure, data loss, or broken software configuration. Comprehensive backups and extensive testing are strongly advised. To avoid these problems, when possible, we recommend migrating to a fresh Ubuntu 16.04 server rather than upgrading in-place. You may still need to review d
sar コマンド
sar (System Admin Reporter）は、CPUやメモリ、ネットワーク、ディスクなどのシステム情報を確認･出力できるコマンドです いろいろな引数がありますが、よく利用するものをメモ -u CPU使用率（ 引数なしの場合、この情報が表示される) [test000]% sar -u Linux 2.6.18-308.4.1.el5 (test000) 2012年XX月XX日 00時00分01秒 CPU %user %nice %system %iowait %steal %idle 00時10分01秒 all 14.76 0.00 2.69 0.01 0.00 82.54 00時20分01秒 all 14.77 0.00 2.73 0.01 0.00 82.49 ... 13時40分01秒 all 15.92 0.00 2.25 0.01 0.00 81.82 平均値: all
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