Yinux

Quoted from http://www.cyberciti.biz > grep --color='auto' -i error /var/log/messages Set for shell default usage > vi ~/.bash_profile # add the following lines export GREP_COLOR='1;37;41' alias grep='grep --color=auto'

> cat /proc/modules > lsmod > modinfo [mod_name_from_lsmod]

# download ISO files under /tmp ls /tmp rhel-5-server-supplementary-x86_64-disc1.iso rhel-5-server-x86_64-disc1.iso rhel-5-server-x86_64-disc2.iso rhel-5-server-x86_64-disc3.iso rhel-5-server-x86_64-disc4.iso rhel-5-server-x86_64-disc5.iso rhel-5-server-x86_64-disc6.iso # write script to combine ISO files # This script is writen by Chris Kloiber. #!/bin/bash # by Chris Kloiber # A quick hack that will create a bootable DVD iso of a Red Hat Linux # Distribution. Feed it either a directory containing the downloaded # iso files of a distribution, or point it at a directory containing # the "RedHat", "isolinux", and "images" directories. # This version only works with "isolinux" based Red Hat Linux versions. # Lots of disk space required to work, 3X the distribution size at least. # GPL version 2 applies. No warranties, yadda, yadda....

Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and both console and graphical versions are available [root@lsvr02 ~]# nmap 127.0.0.1 Starting Nmap 4.11 ( http://www.insecure.org/nmap/ ) at 2007-10-25 09:47 HKT Interesting ports on lsvr02 (127.0.0.1): Not shown: 1668 closed ports PORT STATE SERVICE 2...

The difference between .rpm and .src.rpm is that .src.rpm includes the source codes and it is required to compile to install. rpm -i [software-package].src.rpm cd /usr/src/redhat/SPECS rpmbuild -bp [software-package].specs cd /usr/src/redhat/BUILD/[software-package] ./configure make && make install OR rpmbuild --target i386 --rebuild [software-package].src.rpm /usr/src/redhat/RPMS/i586/xl2tpd-1.1.11-2.i386.rpm