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Centos History command history add execution time Add the following environment variable to the end of/etc/profile export HISTTIMEFORMAT ='% F %T'

Executing environment variables takes effect source /etc/profile test results [root@localhost network-scripts]# history 1 2019-12-06 13:57:01 free -m 2 2019-12-06 13:57:32 cat /proc/cpuinfo 3 2019-12-06 13:57:39 top 4 2019-12-06 13:58:19 ll 5 2019-12-06 13:58:27 cd /etc/sysconfig/network-scripts/ 6 2019-12-06 13:58:27 ls 7 2019-12-06 13:58:28 ll 8 2019-12-06 13:58:41 ip addr 9 2019-12-06 13:58:46 vim ifcfg-em1 10 2019-12-06 13:58:51 yum install vim -y 11 2019-12-06 14:01:23 history 12 2019-12-06 14:04:15 vim /etc/profile 13 2019-12-06 14:04:48 source /etc/profile 14 2019-12-06 14:04:50 history 15 2019-12-06 14:05:13 vim /etc/profile 16 2019-12-06 14:05:22 source /etc/profile 17 2019-12-06 14:05:23 history [root@localhost network-scripts]# #command interval can be adjusted when defining environment variables

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