A system administrator often needs to run a command repeatedly in a certain periods of time. Often such tasks can be easily completed with simplecron commands. In most of the cases this should work, but the shortest period which you can run cron command is every 1 minute. Believe it or n...
homer@homer-pc:~$ free --help Usage: free [options] Options: -b, --bytes show output in bytes -k, --kilo show output in kilobytes -m, --mega show output in megabytes -g, --giga show output in gigabytes --tera show output in terabytes -h, --human show human-readable output --...
剖析(Profiling) #Sample on-CPU functions for the specified command, at 99 Hertz: perf record -F 99 command #Sample CPU stack traces (via frame pointers) system-wide ,at 99 Hertz,for 10 seconds: perf record -F 99 -a -g sleep 10 #Sample CPU stack traces for the PID, using dwarf (...
-t, --total show total for RAM + swap -s N, --seconds N repeat printing every N seconds -c N, --count N repeat printing N times, then exit 字段:常关注行和列的含义 Mem: total:总内存 used:使用内存 free:空闲内存 shared:多个进程的共享内存,一般不用 buff/cache:缓存 available:系统可用...
--lohi show detailed low and high memory statistics-t, --total show total for RAM + swap-s N, --seconds N repeat printing every N seconds-c N, --count N repeat printing N times, then exit-w, --wide wide output--help display this help and exit-V, --version output version informa...
Step 1 ? Open a terminal and type following command ? $ watch -n <interval> <command> Replace <interval> with time interval at which you want command to repeat, in seconds. Replace <command> with command you want to repeat. For example, if you want to run top command every 5 second...
In this tutorial, we’ll learn how toautomatically repeat any Linux command every X secondsusing the command line. This is particularly useful for automating tasks that need to be performed continuously. Another use case is checking various system health parameters periodically to make sure everythin...
然后缓存某个10ms接口的数据，同机房内redis访问延迟是0.1ms的量级 当缓存命中率分别为1% 10% 50% ...
COMMAND:进程的名称 PID:进程标识符 USER:进程所有者 FD:文件描述符,应用程序通过文件描述符识别该文件。如cwd、txt等 TYPE:文件类型,如DIR、REG等 DEVICE:指定磁盘的名称 SIZE:文件的大小 NODE:索引节点(文件在磁盘上的标识) NAME:打开文件的确切名称
(8)-ps exclude(^)|select PIDs-S[t] t second stat timeout (15)-Tqs TCP/TPI Q,St (s) info-g[s] exclude(^)|select and print process group IDs-ii select by IPv[46] address: [46][proto][@host|addr][:svc_list|port_list]+|-r [t[m<fmt>]] repeat every t seconds (...