Linux 进程挂起、恢复、结束操作

zmx

2023 年 12 月 27 日

343 次浏览

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linux

# 查看进程

```shell
ps -aux
```

## 序列解释：

| USER | PID    | %CPU      | %MEM       | VSZ              | RSS                  | TTY    | STAT     | START    | TIME     | COMMAND    |
| ------ | -------- | ----------- | ------------ | ------------------ | ---------------------- | -------- | ---------- | ---------- | ---------- | ------------ |
| 用户 | 进程ID | cpu使用率 | 内存使用率 | 虚拟内存占用大小 | 实际物理内存使用大小 | 终端号 | 进程状态 | 启动时间 | 执行时间 | 运行命令行 |

### 进程状态解释

具体解释可参阅`man ps`

PROCESS STATE CODES
Here are the different values that the s, stat and state output specifiers (header "STAT" or "S") will display to describe the state of a process:

```bash
D    uninterruptible sleep (usually IO)
           I    Idle kernel thread 空闲内核线程
           R    running or runnable (on run queue) 运行状态
           S    interruptible sleep (waiting for an event to complete) 休眠状态
           T    stopped by job control signal 暂停
           t    stopped by debugger during the tracing 暂停
           W    paging (not valid since the 2.6.xx kernel)
           X    dead (should never be seen) 死亡进程
           Z    defunct ("zombie") process, terminated but not reaped by its parent 僵尸进程

For BSD formats and when the stat keyword is used, additional characters may be displayed:

<    high-priority (not nice to other users) 高优先级
           N    low-priority (nice to other users) 低优先级
           L    has pages locked into memory (for real-time and custom IO)
           s    is a session leader 领导者，其下有子进程
           l    is multi-threaded (using CLONE_THREAD, like NPTL pthreads do)
           +    is in the foreground process group
```

# 进程操作

python demo

```python
import time
for i in range(0,9999):
    print(i)
    time.sleep(1)
```

执行`ps -aux | grep python`

![image.png](https://www.zunmx.top/usr/uploads/2023/12/2171520394.png)

此时可以看到python3 test.py进程是`S+`

执行`kill -STOP 490142`，再次执行`ps -aux | grep python`
![image.png](https://www.zunmx.top/usr/uploads/2023/12/2764558905.png)

此时可以看到python3 test.py进程是`T`

而运行的python的标签显示
`[1]+  Stopped                 python3 test.py `

![image.png](https://www.zunmx.top/usr/uploads/2023/12/389202033.png)

执行`fg`可继续运行进程 `fg`**将后台运行的或挂起的任务（或作业）切换到前台运行**
![image.png](https://www.zunmx.top/usr/uploads/2023/12/2553841075.png)

也可以使用`kill -CONT 490142`继续运行，但是这种运行会恢复控制台的输入，相当于后台运行
![image.png](https://www.zunmx.top/usr/uploads/2023/12/1651048186.png)