history命令添加时间及记录到syslog日志

history记录中添加时间，用户地址等信息

vi /etc/profile

export HISTTIMEFORMAT=" %F %T `who -u am i 2> /dev/null | awk '{print $NF}' | sed -e 's/[()]//g'` `whoami` "

history记录添加到 syslog日志

vi /etc/profile

export PROMPT_COMMAND=' history -a >(tee -a ~/.bash_history | logger -t "$USER[$$] $SSH_CONNECTION") '

source /etc/profile

参考：

https://backdrift.org/logging-bash-history-to-syslog-using-traps

http://webplay.pro/linux/syslog-log-bash-history-every-user.html