Tag Info

Hot answers tagged

2

Postfix doesn't support script hooking upon delivery. In order to workaround this you can setup a crontab to execute the a special script. This script will: Setting up SSH tunnel Flush queue. First, define sender_dependent_relayhost_maps with the right-side value is your tunnel port (for example port 2525). #/etc/main.cf sender_dependent_relayhost_maps ...


2

First, I totally agree with @dyasny, it is hard to find a reasonable use case for 'full VM state (aka. with memory)'. But, if you really want 'virsh save vm_name memdump' without destroy the vm, you can try virsh snapshot-create-as ${domain} ${fake_snap} 'save vm while keep running' \ --no-metadata --atomic --live \ --memspec ...


2

Only root can change ownership of the file, so you don't have to worry about that. You do however have to worry about the permissions. A logfile shouldn't be world writable. You don't want everybody to write the file in arbitrary ways. You only want them to append to the file. You cannot do that with conventional unix permissions, but you have other ...


2

You can pipe the coredump directly into a program that saves the trace to a temporary location, fetches the backtrace, then puts it somewhere the user can access it, then removes the core. See man 5 core for an example of how to do something with a coredump pattern. Essentially you can set the kernel control value kernel.coredump_pattern pipe the coredump ...


1

Regarding your question: each UDP packet will contain multiple flows and 1 flow won't traverse multiple packets. Answer: a long-lived flow could be broken up into multiple datagrams (packets). Also, some high volume flow (i.e. IPFIX) exporting devices will round robin the export to multiple collectors. The front end of the distributed NetFlow collection ...


1

So found this in my digging, Unfortunately, this is a known bug on RHEL/CentOS 6.5 AMIs, however there are two workarounds to extend the file system as you requested: You can mount the volume to another instance and use parted to expand the partition boundary for the volume that the root FS is on as mentioned at the below link: ...


1

Try using "ec2-user" instead of root. ec2-user@192.123.x.x And pem file is both public and private key. So, try saving it as a public key using puttygen.


1

As mentioned by Petter H in his answer, the OOM killer has kill qmgr process. Unfortunately the qmgr is the heart of Postfix mail delivery. When you kill the heart then you kill the person that owns it. Postfix maintain qmgr process as persistent one. It shouldn't die unless the master process told it, perhaps for reloading configuration. If qmgr died ...



Only top voted, non community-wiki answers of a minimum length are eligible