root使用者修改
[root@localhost ~]# vim /etc/profile
末尾新增以下行：
export HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S "
:wq

[root@localhost ~]# source /etc/profile
history檢視；或者退出視窗重新進入，就會顯示執行時間。
如下：
[root@localhost ~]# history
    1 2016-03-29 05:55:13 cat /etc/hosts
    2 2016-03-29 05:55:42 /usr/sbin/ntpdate asia.pool.ntp.org
    3 2016-05-04 09:44:37 date
    4 2016-05-04 09:44:41 ntpq -p
    5 2016-05-04 09:44:46 clear
    6 2016-05-04 09:44:56 yum -y install openssl openssl-devel ruby ruby-json
    7 2016-05-04 09:47:48 wget && tar -zxvf facter-2.4.6.tar.gz && cd facter-2.4.6 && ruby install.rb
    8 2016-05-04 09:48:55 cd ../rm -rf facter*
    9 2016-05-04 09:49:03 cd ../
   10 2016-05-04 09:49:08 rm -rf facter-2.4.6*
   11 2016-05-04 09:49:25 yum -y install
   12 2016-05-04 09:49:47 wget && tar -zxvf puppet-3.8.7.tar.gz && cd puppet-3.8.7 && ruby install.rb
   13 2016-05-04 09:53:01 cp -v conf/auth.conf /etc/puppet/
   14 2016-05-04 09:53:13 cp -v ext/redhat/puppet.conf /etc/puppet/
   15 2016-05-04 09:53:24 cp -v ext/redhat/client.init /etc/init.d/puppet
   16 2016-05-04 09:53:34 chmod +x /etc/init.d/puppet

Linux設定歷史命令顯示執行時間

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