1,292 reputation
27
bio website ralstonrats.co.uk
location Scotland, United Kingdom
age
visits member for 2 years, 9 months
seen Apr 10 at 15:09

Apr
7
comment Linux to linux USB storage?
aware of infiniband - but hardware is only cheap off eBay, requires expensive cabling too and I've only ever seen PCI[e] host adapters. Further, this means running the data on top of TCP/IP with all the complications regarding congestion avoidance. Thanks for the link though.
Apr
7
comment Linux to linux USB storage?
cablewholesale.com/support/technical_articles/… says "will allow for two host devices to be connected directly with a USB 3.0 crossover cable" and it seems that these are available.
Apr
7
comment Linux to linux USB storage?
That was my concern - finding the hardware (since posting I found this: linux-usb.org/gadget/file_storage.html which seems to solve the software problem)
Feb
7
comment Full path name of bash? and base process of Linux?
Why are which and whereis bad? (doh - then I opened the link - ignore me)
Jan
14
comment CUPS denies access to printer
No, none of the config is changed (and nothing noted in cups logs) when I run lpadmin. The classes file is empty and printers.conf has nothing relating to browsing/access control.
Nov
25
comment How to migrate files on Linux from HDD to SSD on a VDS
Some applications don't like symlinks in certain contexts - e.g. opinting your document_root in apache to a symlink will result in lots of 404 errors if you've configure -FollowSymLinks. Further you may run into concurrency issues if the same file is accessed via different paths. NB I'm not saying this is not the way to fox the problem, just that there are hidden gremlins with symlinks.
Nov
25
comment Is it possbile to mount Windows filesystems without using the root account?
@binghenzq: they don't require the root password at the time of mounting. If you don't have root acces on the machine it's still possible to access an SMB filesystem (using smbclient) but it's not possible to mount any filesystem. If nobody knows the root password then your system is highly vulnerable and this MUST be resolved.
Oct
8
comment Massive, unpredictable I/O performance drop in Linux
Then the next thing on my lsit to check would be to check the logs for errors and check there's plenty of memory allocated to buffers/cache (see output of free)
Oct
8
comment Massive, unpredictable I/O performance drop in Linux
....and iotop, fio
Oct
8
comment Massive, unpredictable I/O performance drop in Linux
How are your filesystems and block devices configred? Are you using md? LVM?
Apr
7
comment Linux cache evictions
decreasing surely. Yes they are (decreasing)
Apr
2
comment Linux cache evictions
No - vfs_cache_pressure controls the ratio of meta data vs pagecache retention (at least according to the docs I've read and the experiments I've run)
Mar
27
comment What is the correct way of setting up a Squid Proxy in front of wireless router
What is this magic by which "The ISP's static IP will shift to the Linux box"
Feb
21
comment Can I read what CCFLAGS were used for building a binary?
Thanks Shadok - if you add this as an answer I'll accept it. In my case the code was compiled with gcc 4.5 :) but the binary in question has been stripped :(
Feb
21
comment How to know if a disk is an SSD or an HDD
If this really is a SSD you might want to reformat it to align the erase blocks with the partitions.
Feb
21
comment How do I test that two connected serial ports really transmit data?
I'd have used minicom myself.
Sep
17
comment Fast way to copy a large file on a LAN
Runing rsync against a file accessed over NFS means that the entire contents of the file needs to copied over the network at least once. You don't need a daemon to invoke a client/server rsync - just run it over ssh. (it's theoretically possible to invoke the remote end over telnet / rsh - but rather silly to run such a service in practice - ssh doesn't add a lot of overhead).
Jul
24
comment Importance of fsck at boot with Journalled filesystems?
psusi - what have you been smoking? " Disks do not report writes as completed before..." - yes they do. "enable the write cache, which is disabled by default" - not on any disk I've ever configured. "barriers are used to prevent reordering" - but you said I was "conflating ordering with barriers"
Jul
23
comment Importance of fsck at boot with Journalled filesystems?
There's a lot of missing informaion from this answer hence downvote and answer elsehwere.
Jul
17
comment Run unix command precisely at very short intervals WITHOUT accumulating time lag over time
I think it's also very probable that the programs porg has tested block while running the intended process - which logically they should do to avoid killing the machine they are running on.