创建定时任务

# crontab -l
*/1 * * * * bash /root/cpu10.sh

编写脚本

# cat cpu10.sh
echo "############start_time#####################################" >> /root/cpu10.log
echo `date` >> /root/cpu10.log
ps -eo user,pid,pcpu,pmem,args --sort=-pcpu  |head -n 10 >> /root/cpu10.log
echo "#############end_time#####################################" >> /root/cpu10.log

授权脚本

ls -l cpu10.sh

-rwxr-xr-x 1 root root 278 12月 12 11:52 cpu10.sh

手工运行脚本

# sh cpu10.sh
[root@DCA ~ 2023-12-12 11:55:46]
# cat cpu10.log

验证定时任务是否成功

# tail -f cpu10.log
root           1  0.0  0.3 /usr/lib/systemd/systemd --switched-root --system --deserialize 18
root           2  0.0  0.0 [kthreadd]
root           3  0.0  0.0 [rcu_gp]
root           4  0.0  0.0 [rcu_par_gp]
root           6  0.0  0.0 [kworker/0:0H-kblockd]
root           8  0.0  0.0 [mm_percpu_wq]
root           9  0.0  0.0 [ksoftirqd/0]
root          10  0.0  0.0 [rcu_sched]
root          11  0.0  0.0 [rcu_bh]
#############end_time#####################################