It is possible to backup and restore POSIX ACL's using the standard getfacl and setfacl tools.
To backup the ACL's use getfacl
getfacl -R /some/path > backup.acl
Then, to restore the ACL's, use setfacl
setfacl --restore=backup.acl
This works great to copy ACL's from one server to another.
For a long time I have kept a personal site full of tidbits and snipits of things I had discovered or developed. This was for my own benefit, so that I could keep track of my own thoughts and could access the information from anywhere. Recently, I have decided to try to formalize things a little more in hopes of making this information more useful to other people.
This is an incredibly useful method of analyzing the queries that your MySQL server is processing without having to change the log level, and subsequently, not having to restart the MySQL server.
First, capture the MySQL queries with tcpdump as they come across the wire
tcpdump port 3306 -s 65535 -x -n -q -tttt > tcpdump.out
When you're done capturing the desired traffic, run mk-query-digest from Maatkit to analyze the tcpdump
mk-query-digest --type=tcpdump tcpdump.out | less
If your MySQL data lives on an LVM volume, using an LVM snapshot is a great low-impact method of getting a point-in-time backup of your entire database. The only real gotcha is that snapshot must be made while the data files are in a "safe" state (meaning that all of the data has been written to file, and not only present in memory). Here are the basic steps needed to get a backups
backend default {
.host = "127.0.0.1";
.port = "8080";
.connect_timeout = 600s;
.first_byte_timeout = 600s;
.between_bytes_timeout = 600s;
.probe = {
.url = "/status.php";
.interval = 5s;
.timeout = 1s;
.window = 5;
.threshold = 3;
}
}
// Define the privilged networks
acl privileged {
"127.0.0.0"/8;
"10.0.0.0"/8;
}
sub vcl_recv {
// Allow stale content if backend server is slow or down.
set req.grace = 6h;
// Try to use anonymous pages if backend is down.
if (!req.backend.healthy) {
unset req.http.Cookie;
}
aptitude install linux-headers-`uname -r` build-essential xinetd gcc-4.1 ln -sf /usr/bin/gcc-4.1 /usr/bin/gcc
Unpack the VMware Server .tar.gz file and run the installer:
tar -zxf VMware-server-*.tar.gz cd vmware-server-distrib ./vmware-install.pl
cancel when it wants to run /usr/bin/vmware-config.pl
create the file vmware-config.pl.patch somewhere and add the following to it:
Five days before the first Saturday following the second Tuesday of the month
test "`date +%a`" == "Mon" -a `date +%e | awk '{print (($1 + 1) / 7 > 1 && ($1 + 1) / 7 <= 2)}'` -eq 1First Saturday following the second Tuesday of the month
test "`date +%a`" == "Sat" -a `date +%e | awk '{print (($1 - 4) / 7 > 1 && ($1 - 4) / 7 <= 2)}'` -eq 1Five days before the first Tuesday following the second Tuesday of the month
zmbackup -del YYYY/MM/DD