I can never remember how to change the NIC order in 2008 R2. Navigate to “Networking Connections” and then hit “Alt” to bring up the menu. There you can find “Advanced” menu and the “Advanced Settings” option. There has to be an easier way, but that is the only way I know hot to get to it.
Poor design.
I rsync all my data to a USB drive that I keep at work. I wanted a way to have my rsync script automatically run when I plugged in the drive – kinda like Time Machine.
It ended up being pretty simple. All I needed to do is create and AppleScript and attach it to a “Folder Action” for the /Volumes folder. This script below is launched when a new item is added to the /Volumes folder, i.e. when you insert a new volume. This script will try to run a BASH script if it exists on that volume (.OnInsert)
on adding folder items to this_folder after receiving these_items repeat with current_item in these_items try do shell script POSIX path of current_item & ".OnInsert" end try end repeat end adding folder items to
Save this as a .scpt file and put it in ~/Library/Workflows/Applications/Folder\ Actions folder.
Next, right click the /Volumes folder and select Services -> Folder Action Setup and attach the script you just created
AutoMagic!
As I mentioned in this post I should be able to run a script to find my current gateway’s MAC address. With this info, I should be able to tell when I am home, and launch a script. In this post, I talk about sleepwatcher, which runs a script when the machine is woken up. Sleepwatcher looks for a file named .wakerc and executes it when the machine wakes. If I put the following in my .wakerc, it will execute whatever I like (for example a rsync script) when the machine is woken up and at home:
#!/bin/bash sleep 120 GATEWAY=`/usr/sbin/netstat -rn | /usr/bin/grep default | /usr/bin/grep en1 | /usr/bin/cut -c20-35` MACADDRESS=`/usr/sbin/arp -n $GATEWAY | /usr/bin/cut -f4 -d' '` if [ "$MACADDRESS" = "xx:xx:xx:xx:xx:xx" ]; then /bin/echo "$(date): I am at home now: $MACADDRESS" >> ~/Desktop/wake.txt # script I want to run at home is next line rsync Documents/ server:Documents/ else /bin/echo "$(date): I don't know where I am: $GATEWAY $MACADDRESS" >> ~/Desktop/wake.txt fi
I wanted to move a VM from a RHN Satellite back to the default Red Hat Network. I found these two files contained all the info:
/etc/sysconfig/rhn/up2date
/etc/sysconfig/rhn/systemid
I just moved them aside and ran rhn_register to re-register the system.
Then I ran “yum clean all” to make yum happy
On a dev machine, somehow, I managed to erase my yum.repo.d contents. I wanted to rebuild the repo files back to their default. First you need to figure out what version you are using:
Then visit the correct release at : http://vault.centos.org/
We recently received 2 new servers that I needed to install the newest ESX on. I downloaded the IOSs, but I did not want to have to burn them. So I decided to try and install ESX via PXE. I did not have an answer file (kickstart), so I wanted to run an interactive install from PXE.
I already had a PXE/TFTP server configured, so I just needed to add a new instance to the pxelinux.cfg file.
LABEL VMWARE-ESX
KERNEL images/vmware/esx/vmlinuz
APPEND initrd=images/vmware/esx/initrd.img vmkopts=debugLogToSerial:1 mem=512M url=http://server.name.local/vmware
The different options for “APPEND” can be found here. Works like a charm.
I can never remember xcopy’s flags, so I am creating a post for myself.
xcopy SourceDrivePath DestDrivePath /X /C /E /H /Y /D
/X Perms
/C continue on error
/E Recursive with empty folders
/H (hidden and system) Copy hidden and system files
/Y (yes) No Prompts
/D (date) SourceDate is newer then DestDate (incremental)
I wanted to create a function that I could use to find the uptime of several workstations. I did not want to read a list of machine name from csv, I just wanted pass a list of workstation names and get their uptime back. I also added a ping check to make sure the machine is alive.
Function Get-Computer-LastBootTime {
$Args | ForEach-Object -Process {
$ping = gwmi Win32_PingStatus -Filter ("Address='" + $_ + "'") | Select-Object StatusCode
if ($ping.statusCode -eq 0) {
$wmi = gwmi Win32_OperatingSystem -EA silentlycontinue -ComputerName $_
$localdatetime = $wmi.ConvertToDateTime($wmi.LocalDateTime)
$lastbootuptime = $wmi.ConvertToDateTime($wmi.LastBootUpTime)
$uptime = $localdatetime - $lastbootuptime
$days=$uptime.Days
$hours=$uptime.Hours
$mins=$uptime.Minutes
echo "$_ uptime: $days days $hours hours $mins mins"
}
else {
echo "$_ is offline"
}
}
}
I wish I read release notes, it would make my life easier. In my previous post, I was worried about CentOS 5.x not having a new enough version of PHP to run the soon to be release WordPress 3.2. Well, RedHat’s 5.6 release notes clearly say:
Version 5.3.3 of PHP is now available in Red Hat Enterprise Linux 5.6 as the separate
php53package
To move to the 5.3 version of PHP, I ran the following commands:
That was easy.
My site just crashed!!! I received the oh-so-helpful error “establishing a database connection” when I went to my site. Other sites on the server were fine. The site was working fine, and my config had not changed. The httpd error log showed nothing.
Then I found this in the MySQL logs (/var/log/mysqld.log)
[ERROR] /usr/libexec/mysqld: Table ‘./db_name/wp_options’ is marked as crashed and should be repaired
To fix I ran:
mysql -e “use db_name;REPAIR TABLE wp_options”
And we are back . . .