I have an hourly hour-long crontab job running with some mtr (traceroute) output every 10 minutes (that is going to go for over an hour prior to it being emailed back to me), and I want to see the current progress thus far.On Linux, I have used lsof -n | fgrep cron (lsof is similar to BSD's fstat), and it seems like I might have found the file, but it is annotated as having been deleted (a standard practice for temporary files is to be deleted right after opening):COMMAND     PID       USER   FD      TYPE     DEVICE  SIZE/OFF       NODE NAME...cron      21742       root    5u      REG      202,0      7255      66310 /tmp/tmpfSuELzy (deleted)And cannot be accesses by its prior name anymore:# stat /tmp/tmpfSuELzystat: cannot stat `/tmp/tmpfSuELzy': No such file or directoryHow do I access such a deleted file that is still open?
How can I access a deleted open file on Linux (output of a running crontab task)?
linux;data recovery;open files
The file can be access through the /proc filesystem: you already know the PID and the FD from the lsof output.cat /proc/21742/fd/5