history命令添加時間及記錄到syslog日誌

history記錄中添加時間，用戶地址等信息

vi /etc/profile

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

history記錄添加到 syslog日誌

vi /etc/profile

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

source /etc/profile

參考：

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

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