Linux view process, CPU, memory

First, real-time view

Computer consumption of memory is generally

Use the top command to view, CPU, memory, usage, real-time data; exit with Q-key or Ctrl +c

Top Results interpretation

Top-01:47:27 up, 2 users, load average:0.00, 0.03, 0.05
tasks:154 Total, 1 running, 153 sleeping, 0 stopped, 0 zombie
Cpu (s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
mem:1012076k Total, 705720k used, 306356k free, 79348k buffers
swap:2031612k Total, 0k used, 2031612k free, 332136k cached

Up 6:00 means it's been on for 6 hours.

Load average:0.00, 0.03, 0.05 for load requests per minute, every five minutes, every 15 minutes, combined load

tasks:154 Total, 1 running, 153 sleeping, 0 stopped, 0 Zombie said:

Cpu (s): 0.0%us, 0.0%sy, 0.0%ni, 100.0%id, 0.0%wa, 0.0%hi , 0.0%si, 0.0%st 100% idle rate

mem:1012076k Total, 705720k used, 306356kfree, 79348k buffers with idle

Uptime: View computer uptime average load on users online

Who view details of users who log on online

Last save important operation commands for the computer

Free-h can view memory usage

Swap is virtual memory or swap memory

Second, Scheduled Tasks

1. One-time mission plan at

Add a task

At 18:15

Init 6

Crontab + D exit

At what point in time to dry

What to edit

Crtl+d Exit Edit

View Tasks

Delete a task

ATRM Task number (is the job behind)

Tasks will automatically disappear after execution

2. Recurring Task Plan

* * * * * */bin/jjjjxhhh.sh task--time-sharing day and month task

00 03 * * * Three points per day

20 23 * * * 23 points per day

*/5 * * * * every five minutes

59 23 * 1-2 Weekly, Tuesday 23:59

59 23 * * 1,3,5 per week, Wednesday, Friday 23:59

Crontab

Add to

18:24 reboots per day

Crontab-e

* * * Init 6

View

Ctontab-l

Delete

Crontab-e

Remove the line from that task.

Crontab-r Delete all scheduled tasks under this user

Crontab-i prompt before deleting a user's task schedule

Crontab-s

Three

Linux view process, CPU, memory