如何轻松地将shell脚本中的所有echo语句放入日志文件中

如果你愿意的话 全部的 exec 要重定向:

exec >> "$logfile"

2>&1 .

如果你只想 echo

exec 3>> "$logfile"

ret=123
echo "Something happened $ret" >&3

# some logic 
echo "Something else happened $ret" >&3

您可以在子shell中确定内容的范围,并重定向子shell的输出:

(
    ret=123
    echo Something happened "$ret"
    // some logic 
    echo Something else happened "$ret"
    // some more logic 
    echo Something else happened again "$ret"
) >> /some/location/my_logtxt

如果你只是想影响你的 echo myecho 改为声明:

myecho() {
    echo "$@" >> /some/location/my_logtxt
}

ret=123
myecho Something happened "$ret"
// some logic 
myecho Something else happened "$ret"
// some more logic 
myecho Something else happened again "$ret"

(更合适的名称可能是 log 迈乔