Lock the keychain when idle
Lock the keychain when system sleeps or is idle for 10 minutes.
security set-keychain-settings -l -u -t 600
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Boot in verbose mode
Watch startup messages.
sudo nvram boot-args=-v
check for file collisions when downgrading from HFSX to HFS
when converting from HFSX to HFS (case-sensitive to case insensitive), run this command to verify there will be no file collisions:
2>/dev/null find . -print | tr "[:upper:]" "[:lower:]" | sort | uniq -d
repair disk permissions from the command line
sudo diskutil repairPermissions /
Download with cURL in a Loop Until Completed
From Entropy.ch:
Here’s a little terminal command I use to repeatedly attempt to download a file. This is useful if the transfer aborts frequently or if the server is busy:
The while/do/done loop keeps calling curl, with pauses of 10 seconds. curl will keep returning a failure exit code, which is what keeps the while loop going if inverted with the ! (logical not) operator. The -C - flag tells curl to continue at the last byte position.
Here’s a little terminal command I use to repeatedly attempt to download a file. This is useful if the transfer aborts frequently or if the server is busy:
The while/do/done loop keeps calling curl, with pauses of 10 seconds. curl will keep returning a failure exit code, which is what keeps the while loop going if inverted with the ! (logical not) operator. The -C - flag tells curl to continue at the last byte position.
while ! curl -C - -O 'http://download.parallels.com/GA/Parallels%20Desktop%203186%20Mac%20en.dmg'; do sleep 10; done
Zero data on a Linux disk
For use with VMWare when you don't run an X server:
cat /dev/zero > zero.dat ; sync ; sleep 1 ; sync ; rm -f zero.dat
How to ssh into Ubuntu on Parallels by hostname
this is something that strangely doesn't happen automatically on ubuntu
in Ubuntu, just add
to your /etc/dhcp3/dhclient.conf file
you might need to do a
On your Mac, you can now do
instead of
in Ubuntu, just add
send host-name "dapperbox";
to your /etc/dhcp3/dhclient.conf file
you might need to do a
sudo /etc/services/networking restart
On your Mac, you can now do
ssh username@dapperbox
instead of
ssh username@1.2.3.4
Generate DSA Keys
// generates SSH DSA keys in ~/.ssh/
ssh-keygen -d
rsync syntax
rsync -avz --eahfs --progress --delete /source-dir-without-trailing-slash /destination-dir-with-trailing-slash
// explanation of switches
// -a, archive mode, equivalent to -rlptgoD which does things like recurse through all the dirs, preserves times, etc.
// -v, verbose mode
// -z, compress - makes the copy go faster. doesn't actually compress into a zip file
// --eahfs - (could also use -E, I think)
// --progress - show copy status of each item
// --delete, delete files on destination that aren't on source (sync)
tar syntax
// tar:
// untar:
tar -cvzf file.tar.gz inputfile1 inputfile2
// untar:
tar -xvzf file.tar.gz
