[root@localhost ~]# yum -y install psmisc
已加载插件：fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: centos.ustc.edu.cn
 * updates: centos.ustc.edu.cn
正在解决依赖关系
--> 正在检查事务
---> 软件包 psmisc.x86_64.0.22.20-11.el7 将被 安装
--> 解决依赖关系完成

依赖关系解决

==============================================================================================================================
 Package                     架构                        版本                                 源                         大小
==============================================================================================================================
正在安装:
 psmisc                      x86_64                      22.20-11.el7                         base                      141 k

事务概要
==============================================================================================================================
安装  1 软件包

总下载量：141 k
安装大小：479 k
Downloading packages:
psmisc-22.20-11.el7.x86_64.rpm                                                                         | 141 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  正在安装    : psmisc-22.20-11.el7.x86_64                                                                                1/1
  验证中      : psmisc-22.20-11.el7.x86_64                                                                                1/1

已安装:
  psmisc.x86_64 0:22.20-11.el7                                                                                                

完毕！
[root@localhost ~]# pstree
systemd─┬─NetworkManager─┬─dhclient
        │                └─2*[{NetworkManager}]
        ├─auditd───{auditd}
        ├─chronyd
        ├─crond
        ├─dbus-daemon───{dbus-daemon}
        ├─firewalld───{firewalld}
        ├─irqbalance
        ├─login───bash
        ├─lvmetad
        ├─master─┬─pickup
        │        └─qmgr
        ├─mysqld_safe───mysqld───21*[{mysqld}]
        ├─polkitd───5*[{polkitd}]
        ├─rsyslogd───2*[{rsyslogd}]
        ├─sshd───sshd───bash───pstree
        ├─systemd-journal
        ├─systemd-logind
        ├─systemd-udevd
        ├─tuned───4*[{tuned}]
        └─vmtoolsd───{vmtoolsd}
[root@localhost ~]# pstree -p
systemd(1)─┬─NetworkManager(721)─┬─dhclient(825)
           │                     ├─{NetworkManager}(750)
           │                     └─{NetworkManager}(753)
           ├─auditd(642)───{auditd}(657)
           ├─chronyd(681)
           ├─crond(674)
           ├─dbus-daemon(660)───{dbus-daemon}(662)
           ├─firewalld(710)───{firewalld}(821)
           ├─irqbalance(669)
           ├─login(678)───bash(2463)
           ├─lvmetad(522)
           ├─master(2359)─┬─pickup(42639)
           │              └─qmgr(2364)
           ├─mysqld_safe(1386)───mysqld(1708)─┬─{mysqld}(2394)
           │                                  ├─{mysqld}(2395)
           │                                  ├─{mysqld}(2396)
           │                                  ├─{mysqld}(2397)
           │                                  ├─{mysqld}(2398)
           │                                  ├─{mysqld}(2399)
           │                                  ├─{mysqld}(2400)
           │                                  ├─{mysqld}(2401)
           │                                  ├─{mysqld}(2402)
           │                                  ├─{mysqld}(2403)
           │                                  ├─{mysqld}(2410)
           │                                  ├─{mysqld}(2411)
           │                                  ├─{mysqld}(2412)
           │                                  ├─{mysqld}(2413)
           │                                  ├─{mysqld}(2414)
           │                                  ├─{mysqld}(2419)
           │                                  ├─{mysqld}(2420)
           │                                  ├─{mysqld}(2421)
           │                                  ├─{mysqld}(2422)
           │                                  ├─{mysqld}(2423)
           │                                  └─{mysqld}(2425)
           ├─polkitd(663)─┬─{polkitd}(699)
           │              ├─{polkitd}(700)
           │              ├─{polkitd}(703)
           │              ├─{polkitd}(704)
           │              └─{polkitd}(705)
           ├─rsyslogd(1024)─┬─{rsyslogd}(1424)
           │                └─{rsyslogd}(1425)
           ├─sshd(1469)───sshd(2487)───bash(2491)───pstree(46050)
           ├─systemd-journal(499)
           ├─systemd-logind(670)
           ├─systemd-udevd(530)
           ├─tuned(1025)─┬─{tuned}(2360)
           │             ├─{tuned}(2361)
           │             ├─{tuned}(2362)
           │             └─{tuned}(2365)
           └─vmtoolsd(664)───{vmtoolsd}(708)