查看
查看当前所有进程
$ ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 0 06:59 ? 00:00:02 /usr/lib/systemd/systemd --switched-root --system --
root 2 0 0 06:59 ? 00:00:00 [kthreadd]
root 3 2 0 06:59 ? 00:00:00 [ksoftirqd/0]
实时查看进程状态及 CPU 占用
$ top
top - 09:24:05 up 2:24, 2 users, load average: 0.00, 0.01, 0.04
Tasks: 175 total, 1 running, 174 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.1 us, 0.0 sy, 0.0 ni, 99.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 999964 total, 66488 free, 661372 used, 272104 buff/cache
KiB Swap: 1048572 total, 1046440 free, 2132 used. 120096 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
36 root 20 0 0 0 0 S 0.3 0.0 0:02.48 kworker/0:1
80 root 20 0 0 0 0 S 0.3 0.0 0:00.83 kworker/3:1
2473 mysql 20 0 1888520 379700 10168 S 0.3 38.0 0:22.66 mysqld
1 root 20 0 193628 6396 3632 S 0.0 0.6 0:02.58 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
查看守护进程
$ systemctl list-units
UNIT LOAD ACTIVE SUB DESCRIPTION
proc-sys-fs-binfmt_misc.automount loaded active waiting Arbitrary Executable File Formats File
-.mount loaded active mounted /
boot.mount loaded active mounted /boot
dev-hugepages.mount loaded active mounted Huge Pages File System
dev-mqueue.mount loaded active mounted POSIX Message Queue File System
home.mount loaded active mounted /home
proc-fs-nfsd.mount loaded active mounted NFSD configuration filesystem
run-user-1000.mount loaded active mounted /run/user/1000
run-user-42.mount loaded active mounted /run/user/42