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Linux操作系统包括三种不同类型的进程,每种进程都有自己的特点和属性:
交互进程:由shell启动的进程。
批处理进程:这种进程和终端没有联系,是一个进程序列。
守护进程:在后台持续运行的进程。
前台启动:一般地,用户键入一个命令,就已经启动了一个前台的进程。
后台启动 :对于非常耗时进程,可以然进程在后台运行。从后台启动进程其实就是在命令结尾加上一个“&”号
每个进程,都会对应一个父进程,而这个父进程可以复制多个子进程
每个进程都可能以两种方式存在:后台或前台
进程就是正在执行的程序
显示系统执行的进程:ps命令,可以不加任何参数
1. ps -a :显示当前终端的所有进程信息
2:ps -u :以用户的格式显示进程信息
3. ps -x :显示后台进程运行的参数
ps -aux
终止进程:kill/killall
终止某个进程:kill 进程号 如:kill 6251
kill -q 5222 :因为某些进程会捕捉某些信息,如果直接不能结束进程,可以使用“ -q”传送信息
动态监控进程:top
top和ps类似,top在执行一段时间可以更新正在进行的进程
1.监视特定用户
top:输入此命令,按回车键,查看执行的进程
u:然后输入“u” 回车,在输入用户名即可
2.终止指定的进程
top:
k: 输入k回车,再输入要结束的进程ID
3.top -d 10 :指定系统更新进程的时间为10秒
按小q退出