Hi-- On Apr 14, 2017, at 11:32 AM, Ernie Luzar <luzar...@gmail.com> wrote: > Chuck Swiger wrote: >> On Apr 14, 2017, at 6:47 AM, Ernie Luzar <luzar...@gmail.com> wrote: >>> To aid in debugging the script I'm writing, I place "echo" commands >>> throughout so I can kind of have a trace of the logic as different >>> conditions are processed. Normally I just delete these "echo" commands >>> after I get the script working. >> >> Since you've gotten an answer to the question you asked, let me only note >> that both sh and csh support the -x flag, which causes the shell to echo the >> commands as it runs. This is extremely helpful for debugging. >> Regards, > > Where is the this -x flag coded at? Do the executed lines roll fast off the > screen or can I slowly step through the script a line at a time? > > Thanks for this bit of information.
You can either run the script via "/bin/sh -x myscript.sh" and similar for csh, or you can add -x to the first line of the script, commonly "#! /bin/sh" and invoke it directly via ./myscript.sh. The lines are displayed as rapidly as the shell runs. If running natively on FreeBSD, most people would use a terminal emulator like xterm which provides scrollback. You could also run under nohup, which will save output to a file named nohup.out, unless you redirect output somewhere else. Regards, -- -Chuck _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
