查看 系统版本
rpm -q centos-release![[] CentOS Linux shell command to gather some nice shell management (a) continuously updated](https://s1.51cto.com/images/blog/201908/06/22aec813602eb9b082e8a831da833380.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
查看内核
uname -r
查看目前占用最大内存前10名的进程
ps aux |sort -nrk 4 |head -n 10
查看目前占用cpu 前10名 进程
ps aux |sork -nrk 3 | head -n 10
top 命令
top 命令模式下 输入大写P，则结果按CPU占用降序排序。输入大写M，结果按内存占用降序排序。（注：大写P可以在capslock状态输入p，或者按Shift+p）![[] CentOS Linux shell command to gather some nice shell management (a) continuously updated](https://s1.51cto.com/images/blog/201908/06/55bffc665256645e19e2896bdd9967b6.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
nc command
1 检测端口能否访问
nc -z -v 47.107.44.58 22![[] CentOS Linux shell command to gather some nice shell management (a) continuously updated](https://s1.51cto.com/images/blog/201908/06/6395ec736eabb540651a419d7dc36f6f.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
查看系统被尝试登陆
lastb
![[] CentOS Linux shell command to gather some nice shell management (a) continuously updated](https://s1.51cto.com/images/blog/201908/06/cd9c7c5034f33cf8c4189ab566738928.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)
查看系统 最近成功登陆系统记录
last![[] CentOS Linux shell command to gather some nice shell management (a) continuously updated](https://s1.51cto.com/images/blog/201908/06/306af1581b617fc1c95edbca040de2e3.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)