25%
12.05.2020
):
root@c31656cbd380:/# apt-get update
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
...
Fetched 18.0 MB in 9s (1960 kB/s)
After the package repositories are synced, I can
25%
30.03.2012
Do you have a sentry to keep an eye on your servers? We’ll show you how to customize PortSentry’s response to suspicious activity.
... INPUT -s $1 -j DROP
/usr/bin/logger "portsentry: Removed the ban for IP: $1"
exit 0
fi
# Otherwise ban permanently
exit 0
The second script is fired by Cron every 10 minutes (obviously, that’s ...
Do you have a sentry to keep an eye on your servers? We’ll show you how to customize PortSentry’s response to suspicious activity.
25%
17.12.2014
need a simple tool to help you understand what’s happening on the nodes.
... performance from many perspectives (i.e., CPU, network, disk). The tool is called nmon
.
Nmon Overview
Nmon is short for “Nigel’s Monitor” and is a command-line tool that presents performance information ... need a simple tool to help you understand what’s happening on the nodes.
25%
11.02.2016
wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
sda 2.00 8.00 2.00 9500.00 16.00 151948.00 31.99 1.07 0.11 4.00 0.11 0.09 88.40
If your read or write
25%
21.08.2012
.6 M
Is this ok [y/N]: y
Downloading Packages:
(1/5): apr-1.3.9-3.el6_1.2.i686.rpm | 128 kB 00:00
(2/5): expat-2.0.1-11.el6_2.i686.rpm
25%
19.02.2013
Just as subjects must obey their king, all the computers and servers in an organization should follow the administrator’s commands. With Rex, you don’t even need to leave your admin throne.
... on the administrator’s own machine, which even can be a Windows or Mac OS X machine; the only important thing is that you have a Perl environment in place. To install Rex, first pick up the git
versioning tool (using ...
Just as subjects must obey their king, all the computers and servers in an organization should follow the administrator’s commands. With Rex, you don’t even need to leave your admin throne.
24%
05.03.2014
-s 12:00:00 -e 13:00:00
Linux 3.5.0-43-generic (hercules) 02.12.2013 _x86_64_ (2 CPU)
12:05:01 CPU %user %nice %system %iowait %steal %idle
12
24%
20.03.2014
jcb@hercules:# sar -u -f /var/log/sysstat/sa02 -s 12:00:00 -e 13:00:00
Linux 3.5.0-43-generic (hercules) 02.12.2013 _x86_64_ (2 CPU)
12:05:01 CPU %user %nice %system
24%
24.09.2015
Understanding the I/O pattern of your application is the starting point for improving its I/O performance, especially if I/O is a fairly large part of your application’s run time.
... seconds) and 80% parallel (800 seconds), but with only one process. Amdahl’s Law says the speedup is 1.00.
As the number of processes increase, the wall clock time of the parallel portion decreases ...
Understanding the I/O pattern of your application is the starting point for improving its I/O performance, especially if I/O is a fairly large part of your application’s run time.
24%
05.03.2014
If you believe Red Hat’s marketing hype, the company has no less than revolutionized data storage with version 2.1 of its Storage Server. The facts tell a rather different story.
... , object access
is designed to make RHSS a full-fledged alternative to Amazon’s S3 or Google Drive by letting users upload files via a web interface. Again, Red Hat sticks to its GlusterFS guns and relies ...
If you believe Red Hat’s marketing hype, the company has no less than revolutionized data storage with version 2.1 of its Storage Server. The facts tell a rather different story.
