linux查看java进程内存使用情况

在Linux系统中，我们可以通过以下几种方法来查看Java进程：

1、使用ps命令

ps命令是Linux系统中用于查看进程状态的命令，通过结合grep命令，我们可以快速找到Java进程，具体操作如下：

ps ef | grep java

这条命令会列出所有包含"java"关键字的进程。ef表示显示所有进程的详细信息，|表示将前一个命令的输出作为后一个命令的输入，grep java表示只显示包含"java"关键字的行。

2、使用jps命令

jps命令是Java自带的一个查看当前系统中所有Java进程的命令，它可以直接显示Java进程的进程ID（PID）和启动类名，具体操作如下：

jps

3、使用top命令

top命令是Linux系统中用于实时查看系统进程状态的命令，通过结合grep命令，我们可以快速找到Java进程，具体操作如下：

top d 1 | grep java

这条命令会每隔1秒刷新一次进程状态，并显示包含"java"关键字的进程。d 1表示刷新间隔为1秒，|表示将前一个命令的输出作为后一个命令的输入，grep java表示只显示包含"java"关键字的行。

4、使用htop命令

htop命令是一个比top命令更强大的实时查看系统进程状态的命令，通过结合grep命令，我们可以快速找到Java进程，具体操作如下：

首先需要安装htop命令：

sudo aptget install htop

然后运行htop命令：

htop

在htop界面中，按下Shift + F2键，输入"java"并回车，即可筛选出所有Java进程。

5、使用pgrep命令

pgrep命令是Linux系统中用于查找匹配特定模式的进程ID的命令，通过结合正则表达式，我们可以快速找到Java进程，具体操作如下：

pgrep f java

这条命令会查找所有包含"java"关键字的进程，并显示它们的进程ID（PID）。f表示使用正则表达式进行匹配。

6、使用pidof命令

pidof命令是Linux系统中用于查找指定程序名的进程ID的命令，通过结合正则表达式，我们可以快速找到Java进程，具体操作如下：

pidof x java | grep v grep

这条命令会查找所有名为"java"或"javaw"的进程，并显示它们的进程ID（PID）。x表示查找指定的程序名，grep v grep表示排除包含"grep"关键字的行。

7、使用lsof命令

lsof命令是Linux系统中用于列出打开的文件、目录和设备等资源的命令，通过结合正则表达式，我们可以快速找到Java进程，具体操作如下：

lsof c java | grep v grep | awk '{print $2}' | xargs I {} ps p {} o pid=,ppid=,cmd=,%mem,%cpu,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty,stat,start,vsz,rss,tty,time,etime,user,stat,start,vsz,rss,tty | sort k 9nr | head n 1000000000000000000000000000000000000000000000000000000000000000 | tail n +2 > /tmp/java_processes.txt && cat /tmp/java_processes.txt | column t s"," o "PID","PPID","CMD","%MEM","%CPU","TIME","ETIME","USER","STAT","START","VSZ","RSS","TTY","STAT","START","VSZ","RSS","TTY","TIME","ETIME","USER","STAT","START","VSZ","RSS","TTY","STAT","START","VSZ","RSS","TTY","TIME","ETIME","USER","STAT","START","VSZ","RSS","TTY","STAT","START","VSZ","RSS","TTY" && echo "按任意键继续..." && read n 1 && clear && cat /tmp/java_processes.txt | column t s"," o "PID","PPID","CMD","%MEM","%CPU","TIME","ETIME","USER","STAT","START,"VSZ,"RSS,"TTY,"STAT,"START,"VSZ,"RSS,"TTY,"TIME,"ETIME,"USER,"STAT,"START,"VSZ,"RSS,"TTY,"STAT,"START,"VSZ,"RSS,"TTY,"TIME,"ETIME,"USER,"STAT,"START,"VSZ,"RSS,"TTY,"STAT,"START,"VSZ,"RSS,"TTY && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true && echo "按任意键退出..." && read n 1 && exit 1 || true || true) | sort k 9nr | head n $(cat /tmp/java_processes.txt | wc l) | tail n +2 > /tmp/java_processes.txt & disown & wait %% & clear & cat /tmp/java_processes.txt | column t s',' o "PID","PPID","CMD","%MEM","%CPU","TIME","ETIME","USER","STAT","START",VSZ,"RSS",TTY,"STAT",START,"VSZ",RSS,"TTY",TIME,"ETIME",USER,"STAT",START,"VSZ",RSS,"TTY",STAT,"START",VSZ,"RSS",TTY,"TIME",ETIME,"USER",STAT,"