远程检测Linux服务器中内存占用情况的方法
在Linux系统中，我们可以使用多种命令来查看服务器的内存占用情况，以下是一些常用的命令：
1、free命令
free命令是最简单的查看内存使用情况的命令，它可以显示系统的总内存、已使用内存、空闲内存等信息，要查看内存使用情况，只需在终端输入free -h,然后按回车键。-h选项表示以人类可读的格式显示结果，即以KB、MB或GB为单位显示数据。
free -h
输出示例：
total used free shared buff/cache available
Mem: 7.7G 3.1G 1.2G 542M 3.1G 3.4G
Swap: 2.0G 0B 2.0G
2、top命令
top命令可以实时显示系统中各个进程的资源占用情况，包括CPU、内存、磁盘I/O等，要查看内存使用情况，只需在终端输入top,然后按回车键，在显示的结果中，可以看到内存占用情况的详细信息。
top
输出示例：
KiB Mem : 7896968 total, 7896640 free, 16288 used, 32768 buff/cache
KiB Swap: 2097148 total, 0 free, 1048572 used, 2097148 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ ARGS
1 root 20 0 256560 3456 540 S 0.0 0.3 0:01.12 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:00.03 ksoftirqd/0
5 root 20 0 0 0 0 S 0.0 0.0 0:01.37 rcu_sched
7 root rtx 0 0 0 0 S 0.0 0.0 0:01.37 migration/rt
3、ps命令与top命令结合使用
要查看某个进程的内存占用情况，可以使用ps命令，要查看进程ID为1234的进程的内存占用情况，可以在终端输入ps aux | grep [1234],然后按回车键，这将显示该进程的详细信息，包括内存占用情况，如果只想查看内存占用情况，可以使用awk命令进行筛选，如下所示：
ps aux | grep [1234] | grep --color=never 'rss|vsz' | sort +rss | head -n 5
输出示例：
USER PID %CPU %MEM VSZ RSS PCY UID NAMES root 1234 3.3% 3.1g 985k ? Ss 12345 name1 name2 name3 name4 name5 name6 name7 name8 name9 name10 name11 name12 name13 name14 name15 name16 name17 name18 name19 name20 name21 name22 name23 name24 name25 name26 name27 name28 name29 name30 name31 name32 name33 name34 name35 name36 name37 name38 name39 name40 name41 name42 name43 name44 name45 name46 name47 name48 name49 name50 name51 name52 name53 name54 name55 name56 name57 name58 name59 name60 name61 name62 name63 root <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> <defunct> .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... / (rrbs) (rrbs) /
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