Thursday, April 30, 2015

Linux sunucuda ekstra swap (takas) alani olusturma

# cat /etc/issue
Oracle Linux Server release 6.5
Kernel \r on an \m
# uname -a
Linux server 2.6.32-504.1.3.el6.x86_64 #1 SMP Tue Nov 11 17:57:25 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

32G swap alanı oluşturmak için;

# dd if=/dev/zero of=/swapfile bs=1024 count=32553600
# mkswap /swapfile
# swapon /swapfile

swap alanının açılışta otomatik mount olması için /etc/fstab 'e eklenen satır;

/swapfile               swap                    swap    defaults        0 0

Wednesday, April 29, 2015

Oracle: OSWatcher Black Box

Oracle OSWatcher Black Box (OSWbb) collects and archives operating system and network metrics that you can use to diagnose performance issues. OSWbb operates as a set of background processes on the server and gathers data on a regular basis, invoking such Unix utilities as vmstatnetstatiostat, and top.

OS watcher data file larini grafik arayuzde goruntuleme islemi:

Friday, April 24, 2015

The "make" Command and "Makefiles"

A makefile consists of a set of dependencies and rules. A dependency has a target (a file to be created) and a set of source files upon which it is dependent. The rules describe how to create the target from the dependent files. Typically, the target is a single executable file.

...  (details)

Wednesday, April 15, 2015

Set file format of the output capture file (.pcap)

editcap - Edit and/or translate the format of capture files
Editcap is a program that reads some or all of the captured packets from the infile, optionally converts them in various ways and writes the resulting packets to the capture outfile (or outfiles).


# editcap -F libpcap radius_00002_20150324120131.pcap  rad2.pcap

Friday, April 10, 2015

Linux: IPv6 deaktif hale getirme

sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
sysctl -w net.ipv6.conf.lo.disable_ipv6=1