If /home is just a folder under / and you have a reason to put this on it’s own partition the process isn’t that difficult. Here is the steps I followed to do this.
First, create the new partition on the drive. I was using LVM, so I created a new logical volume, do whatever makes sense for your system here.
Make a place for the new home partition to be mounted while we transfer files.
mkdir /mnt/newhome mount -t /mnt/newhome
Move files from current /home to this new location.
cd /home cp -ax * /mnt/newhome
Once all the files have copied, remove the old home directory, and mount the new partition in its place.
rm -r /home mount -t /home
Edit /etc/fstab for the new partition, and you’re done.
Using passwd it is possible to quickly lock and unlock Linux accounts.
To lock an account.
passwd -l username
To unlock an account.
passwd -u username
Using telnet (or putty) it’s possible to some simple tests against a POP server. By no means exhaustive, it can give you insights in where to start troubleshooting.
First, using telnet and open a connection the remote POP server
telnet mailserver 110
Where mailserver is the mail server you want to connect to. Note that port 110 is the default port for POP, but could be different depending on your servers settings.
Once connected, use USER and PASS to login.
[root@ms1 ~] # telnet localhost 110 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. +OK POP3 localhost v2001.78rh server ready USERusername+OK User name accepted, password please PASSpassword+OK Mailbox open, 1 messages QUIT +OK Sayonara Connection closed by foreign host.
Using ping6 and ip neigh it’s possible to discover other IPv6 hosts on your local network using the link-local addresses.
First, use ping6 to ping all hosts on the local network using the IPv6 link-local address
ping6 -c 2 -I eth0 ff02::1
Then, use ip neigh to show a list of IPv6 enable hosts on the local network
ip -f inet6 neigh
I recently started using FreeNAS again after exploring other options that existed, such as openfiler, and now that I’ve returned, ZFS seems to be the cool thing to do. After reading, watching videos and playing with ZFS I’m sold on all the features it offers. However, I must ask, is there a compelling reason to use ZFS over UFS for a single disk? I’d really like to see some comments on this.
We’re using asterisk, and as part of the dial plan, a 9 is required before the number to make calls out to the PSTN. Since our phones have a incoming call log, it would be very convient to have asterisk rewrite the CallerID value on calls from the PSTN to include this leading digit. I found this was rather easy to accomplish. Adding something similar to the following to whatever extension handles your incoming calls, all CallerID numbers will have a 9 added to the front.
exten => s,1,Set(CALLERID(num)=9${CALLERID(num)})
And proceed with your normal call routing logic. Change the preceding digit to whatever matches your system. If you have several extensions this is going to be used with, you could benefit from using a global variable for the leading digit.
For Windows DropBox users. Here is a simple way to share list of links for your Public folder. This script doesn’t show files in sub-directories.
1. Create a makefilelist.bat file with script to list all files in directory.
2. Use Scheduled Tasks to run the .bat file Daily or Weekly, etc as needed; depending on how often you update files in DropBox Public.
3. Share the list file with “Copy Public Link”.
4. Open Public Link in a browser. You know have a list of all public files that is up-to-date.
You can see an example and download the makefilelist.bat file here:
http://dl.dropbox.com/u/4355901/index.html
The description from asterisk for this is GotoIf(condition?[labeliftrue]:[labeliffalse]), however for me (being somewhat new to asterisk, and not fully understanding all the little bits, this was a bit confusing. A better way of describing this, at least for those of use new to asterisk, might be GotoIf(condition?[context,priority,labeliftrue]:[context,priority,labeliffalse]).
I have not used labels in the dial plan before, and when starting out with this application I read label to be a context. This lead me to write my dial plan similar to this..
[default] exten => 100,1,GoToIf(condition?true,false) [true] exten => s,1,... [false] exten => s,1,...
In retrospect, it’s obvious what the documentation is saying, but as I said, not being familiar with labels, I was a bit lost.
Had a need to capture some traffic on the remote machine and analyze it in Real Time ™. Found to solutions to this. The first, involved just sending the output of tcpdump across the ssh session.
ssh host.example.org tcpump - eth0 -w - > capture.pcap
The other method, picked up from the wireshark wiki allows for the captured traffic to be viewed as it’s being captured in wireshark. This is done using a combination of ssh and a fifo pipe. The exact command can very slightly, and I suggest reading the relevant man pages, but something similar to the following (taken from their wiki) should do the trick.
mkfifo /tmp/pipe
ssh user@remote-host "tshark -w - not port 22" > /tmp/pipe
wireshark -k -i /tmp/pipe
I needed to remove a physical volume from a LVM volume group, and found this is done using the pvmove command. However, trying to run this, resulted in an immediate, and suprising error
# pvmove /dev/sdb1 /dev/sdc1 Required device-mapper target(s) not detected in your kernel
After some quick google’ing I found on this list a cause, and a fix. Appreantly, pvmove uses something provided by the raid1 module to do it’s magic. So, loading loading the dm-mirror kernel module fixes the issue and pvmove works as expected. Thanks debian-user list 
