**期间，有小伙伴想实现linux命令的实时记录功能，花了1小时时间，查阅了些资料，对Linux做少许改动，便可实现对Linux的命令实时记录，并配置syslog可以做到对操作命令的集中收集。
下面时配置步骤：
1、在/etc/profile下增加如下代码
# cat << EOF >>/etc/profile
export HISTTIMEFORMAT="`echo ${SSH_CONNECTION}`|#|`whoami`|#|%F %T|#|"
export PROMPT_COMMAND="history -a; history -c; history -r;"'echo $(history 1) >>/var/log/command.log'
EOF
2、创建/var/log/command.log文件，并将文件权限设置为662
# chmod 662 /var/log/command.log
3、开启syslog，实时将command内容发送到远程服务器。
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