ubuntu常用命令

//查看内核版本xxx@ubuntu:~$ uname -r4.2.0-27-generic//查看发行版本xxx@ubuntu:~$ cat /etc/issueUbuntu 14.04.4 LTS \n \l//查看发行版本xxx@ubuntu:~$ cat /etc/issueUbuntu 14.04.4 LTS \n \l//查看CPU使用率xxx@ubuntu:~$ toptop - 05:31:35 up 7 min,  2 users,  load average: 0.66, 0.29, 0.14Tasks: 229 total,   1 running, 228 sleeping,   0 stopped,   0 zombie%Cpu(s):  7.8 us,  3.6 sy,  0.0 ni, 88.4 id,  0.2 wa,  0.0 hi,  0.0 si,  0.0 stKiB Mem:   2031244 total,  1479232 used,   552012 free,    65464 buffersKiB Swap:  2094076 total,        0 used,  2094076 free.   469684 cached Mem