摘要:
#umount /mnt/fourtumount: /mnt/fourt: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) ... 阅读全文
摘要:
f <- function(start_time) { start_time <- as.POSIXct(start_time) dt <- difftime(Sys.time(), start_time, units="secs") # Since you only want the H:M... 阅读全文