what is 99 9 uptime

1.uptime commandOutput: 16:11:40 up, 4:21, 2 users, load average:0.00, 0.01, 0.002. View the/proc/uptime file calculation system start timeCat/proc/uptimeOutput: 5113396.94 575949.85The first number is the system has been running for 5,113,396,.94

Linux process viewing and managementBasic features of the OS: file system, network functions, process management, memory management, drivers, security featuresprogram = instruction + dataCpu:Privileged DirectivesGeneral InstructionsProgram execution

SHOW STATUS;FLUSH STATUS;View current number of connections show STATUS like ' thread_% ';Thread_cached: The number of threads being cachedThread_running: The number of threads in the active stateThread_connected: The number of threads currently

Linux Login Prompt ( static / dynamic MOTD) when the user enters a password or uses the key to After logging in, let the server automatically perform several simple actions for us, such as printing prompt information, printing exception information,

When there is a problem with the Linux system, we not only need to look at the system log information, but also use a lot of performance monitoring tools to determine what part (memory, CPU, hard disk ...). ) out of the question. In the Linux system,

Day 3: Select Conditions Outline Application Instance Analysis Conditional Test If... Else... Fi Case... In... Esac Implementation menu: After the script is executed Press 1 to display the current time Press 2 to display the CPU load Press 3 to

Day Three: Conditional selection Outline application Example Analysis Condition test if...else...fi Case...in...esac Implement function Menu : After executing the script Press 1 to display the current time Press 2 to show CPU load

Performance diagnostics for Linux in 60,000 millisecondsWhen you log on to a Linux server in order to solve a performance problem: What should you check in the first minute?At Netflix, we have a huge EC2 Linux cloud, as well as a number of

Need to monitor Linux server system performance? Try the following built-in system or attachment tools. Most Linux releases are equipped with a large number of monitoring tools. These tools provide metrics that can be used to obtain relevant

A Linux server Performance View 1.1 CPU Performance View 1, view the number of physical CPUs:cat /proc/cpuinfo |grep "physical id"|sort|uniq|wc -l2. View the number of cores in each physical CPU:cat /proc/cpuinfo |grep "cpu cores"|wc -l3, the number