如何让history命令显示具体时间？

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HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S"

export HISTTIMEFORMAT
 
 #避免重启后失效，可写入/etc/profile文件中
/etc/profile

• 实例

[root@zabbix ~]# tail /etc/profile	#查看文件的后10行
done

unset i
unset -f pathmunge
setterm -blank 0 &> /dev/null
setterm -powersave off &> /dev/null
setterm -powerdown 0 &> /dev/null
ulimit -SHn 65535
HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S"
export HISTTIMEFORMAT
[root@zabbix ~]# 

[root@zabbix ~]# history | head	#查看history的前10行
    1  2018-11-10 14:54:31yum install httpd
    2  2018-11-10 14:54:31getenforce
    3  2018-11-10 14:54:31rpm -Uvh https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
    4  2018-11-10 14:54:31yum install mysql-* --skip-broken
    5  2018-11-10 14:54:31yum update 
    6  2018-11-10 14:54:31yum install php -y
    7  2018-11-10 14:54:31php -v
    8  2018-11-10 14:54:31yum remove php-common
    9  2018-11-10 14:54:31rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm
   10  2018-11-10 14:54:31rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm
[root@zabbix ~]#