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20h
comment How does copy-on-write in fork() handle multiple fork?
I think David Kohen is right to some point. This is one way to implement copy-on-write. The gist would be that with this marking, writing to that page would trigger a page-fault handler that would then take appropriate action, i.e. copy-on-write. Unfortunately this detail (which would be system-specific) is mostly irrelevant for the question. Keep in mind that CoW has two dimensions: the one visible to the process and the one of how the kernel might implement it.
20h
revised How does copy-on-write in fork() handle multiple fork?
deleted 9 characters in body
Jun
20
awarded  Good Question
Jun
18
asked Is the functionality of libipset covered by CAP_NET_ADMIN?
Jun
15
revised userns container fails to start, how to track down the reason?
deleted 375 characters in body
Jun
12
awarded  Notable Question
Jun
11
asked Is it allowed to assign one range of subordinate IDs to two different users?
Jun
11
accepted How would I register a dynamically named variable in an Ansible task?
Jun
11
comment Determine the target of an SSH connection at runtime
@Gilles: Paramiko already does parsing. In fact it is often used for the task in absence of any alternatives. Interesting that new OpenSSH clients have this feature. I was really just asking, because I didn't know of that feature. Thanks.
Jun
11
comment Determine the target of an SSH connection at runtime
@Gilles: are you suggesting to pass the ProxyCommand stanza with the command substitution on the command line (-o) or is it actually possible to put this into the ~/.ssh/config file? I'm asking because Paramiko for one doesn't handle this syntax in its OpenSSH config parsing.
Jun
11
comment How would I register a dynamically named variable in an Ansible task?
Thanks, I'll try it out, but it's unlikely I'd put that solution as it is longer and more convoluted than even the one were I duplicate everything (at the bottom of my question). Readability is one of the strengths of Ansible otherwise, so working around that will come back to bite me :)
Jun
10
comment Check if directory is a mount point
Also beware of btrfs and potential other file systems with subvolume features. In those cases the device field will be different and yet it's neither a mount point (not in mtab or similar) nor is it a separate partition.
Jun
10
comment Determine the target of an SSH connection at runtime
I'd rather call that the old way of doing it. Prior to the ssh client supporting the -W switch, it was the normal way of doing things, but I think it makes sense to mention the ProxyCommand ssh -W %h:%p user@address form for cases where ssh -W is available. Personally I prefer the latter method always, because not on all jump hosts will I have nc or the rights to install it, but ssh is often recent enough.
Jun
10
asked How would I register a dynamically named variable in an Ansible task?
Jun
10
revised List ALL Ansible variables for a host or group with an ad hoc command?
added 98 characters in body; edited title
Jun
10
asked List ALL Ansible variables for a host or group with an ad hoc command?
Jun
10
accepted In Ansible dynamic inventory JSON, can I “render” hostvars based on the hostname?
Jun
10
comment Why is root login via SSH so bad that everyone advises to disable it?
Changing the port is actually detrimental in many scenarios in itself. And it's nothing more than security by obscurity as well.
Jun
10
revised logcheck wiki description
Trying again to submit what I had posted initally when creating the tag
Jun
10
awarded  Popular Question