in Terminal.app
Do this first – it sets a default that was missing…
defaults write com.apple.Terminal OptionClickToMoveCursor ‘YES’
then you can option-click to move the cursor in terminal windows.
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Category: Unix Notes
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Help debugging sendmail problems
Here’s how to debug some of the sendmail…
?You could kill sendmail, and start it manually via
/usr/lib/sendmail -v -d0-99.99
to make it tell you what its doing with the incoming mail. This will produce tons of output….
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awk is your friend
I thought I was going to have to use the split function, but I found -F instead…
grep APPLETALK_HOSTNAME /etc/hostconfig | awk -F= ‘{print $2}’
the -F option for awk sets the field separator. This lets you refer to the parts of the string by their position…
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groff – man pages
from MacOSXHints…
There was a previous hint that mentioned using ‘col -b’ to convert a manpage to plain text. Unfortunately, plain text doesn’t give nice fontification (underline, italics, etc).
You can convert manpages to much nicer looking html (or postscript) for pretty printing or perusing in a web browser by using groff. In fact, the man command uses the ASCII driver for groff (or maybe troff) to get the output that it displays. Try the following examples:
% groff -Tascii -man /usr/share/man/man1/ls.1 > ls.txt
% groff -Thtml -man /usr/share/man/man1/ls.1 > ls.html
% groff -Tps -man /usr/share/man/man1/ls.1 > ls.ps
The ‘-man’ option is required, as it tells groff to use the ‘an’ set of macros. Look at man groff for more output types (devices) and options.
[Editor’s note: Another previous hint explained how to download and install the newest version of groff if you want to be current. The HTML output option given in this hint is quite nice; use it on the “tcsh” man pages to make them easier to browse.]
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Finding changed files
If you want to see what an application does to the file system try this
touch /tmp/marker
{change a preference via the GUI}
sudo find / -newer /tmp/marker -ls
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Kill an application from AppleScript
on forceQuit(appName)
set pid to word 1 of (do shell script ("ps -xo,pid,command | grep "" & appName & "" | head -n 1"))
do shell script ("kill -9 " & pid)
end forceQuit
forceQuit("Clock")
From another user… i suggest changing that to “ps -xwwo,pid,command …” to avoid a problem where commands with very long path names are truncated, causing the grep to fail.
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What is wrong with this find command
What is wrong with this find command – it is subtle…
find . -type f ! -name "*.mp3" -exec mv "{}" "{}.mp3" ;
Think about what files might be affected
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Empty trashes from root user
How to empty the trash with administrator privileges… handy…
rm -rf /.Trashes/* ~/.Trashes/* ~/.Trash/* # /Volumes/*/.Trashes/*
macosxhints – Option click to position terminal cursor
Well, in the terminal preferences, under the last option “Emulation”, you can turn on “option click to position cursor.” Which allows one to ‘option click’ in any command and have the cursor positioned under the mouse pointer. Particularly useful in pico, so you don’t have to scroll through the whole config file.
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