search for: robertoragusa

Displaying 16 results from an estimated 16 matches for "robertoragusa".

2020 Feb 24
2
Encrypted container on CentOS VPS
...at least (depending how you mount it) > the 'root' will have access to that data while mounted, > obviously! More than that: the root user will be able to access data in the future too, since it can steal the key while the data is mounted. Regards. -- Roberto Ragusa mail at robertoragusa.it
2019 Jul 04
0
Performance issues/difference of two servers running same task (one is quicker)
...=1000000 Then try this to see how fast your disks are for DB operations: cd /a/directory/on/the/filesystem/you/want/to/test time bash -c "for((i=0;i<1000;i++)); do dd 2>/dev/null if=/dev/zero of=test bs=1 count=1 conv=fsync;done" rm test Regards. -- Roberto Ragusa mail at robertoragusa.it
2019 Jul 06
1
Performance issues/difference of two servers running same task (one is quicker)
On Thu, Jul 04, 2019 at 10:46:19AM -0700, Gordon Messmer (gordon.messmer at gmail.com) wrote: > On 7/3/19 11:43 PM, Jobst Schmalenbach wrote: > > - How can it be that the DELL takes so much longer alltough on the far better hardware? > It looks like the DIY system has a CPU that's nearly twice as fast > as the Dell's.? The additional CPU in the Dell will run more tasks >
2019 Aug 01
1
Are those functions thread-safe, i.e. fprintf() and fflush()
Hi, I have one question: Are those functions thread-safe, i.e. fprintf() and fflush() ? Thanks! Regard Andrew
2019 Aug 26
2
Extend DHCP range
I have a simple DHCP range . option routers 192.168.1.1; subnet 192.168.1.0 netmask 255.255.255.0 { range 192.168.1.60 192.168.1.129; range 192.168.1.150 192.168.1.199; } So I want to add a range 192.168.2.1 -> 192.168.2.254 so I did this: subnet 192.168.1.0 netmask 255.255.254.0 { range 192.168.1.60 192.168.1.129; range 192.168.1.150 192.168.1.199;
2020 Aug 10
0
Docker container isolation not working in CentOS 7
...se these summer holidays to wrap my head around Docker and its > quirks. Spent the last couple weeks working through a Udemy tutorial and a > thick book about Docker, and I have Docker CE installed on two machines: Where is your docker coming from? Regards. -- Roberto Ragusa mail at robertoragusa.it
2022 Apr 18
1
Installing mdadm and C7 on new computer
I have a new computer with 2 x 2TB SSDs where I wanted to install C7 and use mdadm for RAID1 configuration and encrypting the /home partition. On the net I found https://tuxfixer.com/centos-7-installation-with-lvm-raid-1-mirroring/ which I adopted slightly with respect to partition sizes, using RAID1 for /boot and /root as well and added the /home partition with RAID1 and chose to have /home
2010 Aug 02
10
Number of hard links limit
Hi, There''s been discussion before on this list on the very small number of hard links supported by btrfs.[1][2] In those threads, an often asked question has been if there''s a real world use case the limit breaks. Also it has been pointed out that a fix for this would need a disk format change. As discussed in bug #15762 [3], there are certainly real-world use cases this
2020 Feb 10
3
CentOS 7 : network interface renamed from eth0 to eth1 after reboot
There may be ways to force NIC naming, I've done so but only on Ubuntu so you'll need to do the research if it's important to you. Things to look for based on my experience: 70-persistent-net.rules, net.ifnames=0, biosdevname=0. ________________________________ From: CentOS <centos-bounces at centos.org> on behalf of Nicolas Kovacs <info at microlinux.fr> Sent: Sunday,
2019 Jul 04
8
Performance issues/difference of two servers running same task (one is quicker)
Hi I need some advice what to do next, even if someone tells me to check out (an)other mailing list(s), tuning site or point me in a better direction how to solve my annoying problem: one server is much faster for certain tasks although on "shitty" hardware. I have tried many things to solve my issue - changed buffer/pool/cache/etc mysqld - changed server settings apache/php -
2020 Feb 24
4
Encrypted container on CentOS VPS
...gt; in the future too, since it can steal the key >> while the data is mounted. >> >> Regards. >> > With a passphare only? Attackers don't need the passphrase, they can use the real key used for encryption (dmsetup table). Regards. -- Roberto Ragusa mail at robertoragusa.it
2020 Aug 10
3
Docker container isolation not working in CentOS 7
Hi, I've decided to use these summer holidays to wrap my head around Docker and its quirks. Spent the last couple weeks working through a Udemy tutorial and a thick book about Docker, and I have Docker CE installed on two machines: * my workstation running OpenSUSE Leap 15.1 * a public sandbox server running CentOS 7 I'm currently fiddling with custom networks and container
2020 Feb 23
4
Encrypted container on CentOS VPS
On 02/17/2020 05:03 AM, lejeczek via CentOS wrote: > On 16/02/2020 15:18, H wrote: >> I wonder if it is possible to set up an encrypted "file container" on a CentOS VPS? I am the root user of the VPS but the hosting company also has access to the VPS and thus all files. Is it possible to create a LUKS-container on the VPS and those files only be accessible by me? IOW, most of
2019 Jun 26
4
iptables - how to block established connections with fail2ban?
I am working to a CentOS 6 server with nonstandard iptables system without rule for ACCEPT ESTABLISHED connections. All tables and chains empty (flush by legacy custom script) so only filter/INPUT chain has rules (also fail2ban chain): Chain INPUT (policy ACCEPT) target prot opt source destination f2b-postfix tcp -- 0.0.0.0/0 0.0.0.0/0 ACCEPT all --
2019 Jun 27
15
raid 5 install
Hello list. The next days we are going to install Centos 7 on a new server, with 4*3Tb sata hdd as raid-5. We will use the graphical interface to install and set up raid. Do I have to consider anything before installation, because the disks are very large? Does the graphical use the parted to set/format the raid? I hope the above make sense. Thank you in advance. Nikos
2009 Nov 12
24
How to Backup and Restore MBR within Logical Volumes?
Hi All, I have several Xen virtual machines within logical volumes using LVM2. I did not use disk images for performance reasons. Conventionally, if I want to clone my virtual machines, I have to dd the LV to an image file. But this consumes a lot of time and harddisk space. So, instead of doing that, I want to use losetup and kpartx with my logical volumes, which contain operating systems of