Zivo NiX BLog

EPEL is a volunteer-based community effort from the Fedora project to create a repository of high-quality add-on packages that complement the Fedora-based Red Hat Enterprise Linux (RHEL) and its compatible spinoffs such as CentOS or Scientific Linux.

http://fedoraproject.org/wiki/EPEL

su -c 'rpm -Uvh http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-2.noarch.rpm'
...
su -c 'yum -y install foo'

ls -t
ls -Z

Text Syntax Virtual Host Options:

httpd -t

httpd -S

httpd: Could not reliably determine the server’s fully qualified domain name, using 192.168.1.5 for ServerName
VirtualHost configuration:
wildcard NameVirtualHosts and _default_ servers:
_default_:443          192.168.1.5 (/etc/httpd/conf.d/ssl.conf:81)
Syntax OK

Configure SElinux Contexts : Use same context as /var/www/html

sudo chcon -R –reference=/var/www/html/ public_html/

Primero bootear en el cd de rescate:

1) boot: Linux Rescue

2) Omitir montar partición

//cargar los volumentes lógicos

# lvm vgchange -a y

//Comprobar el disco duro
# e2fsck -f /dev/VolGroup00/LogVol00

//Reducir el tamaño
# resize2fs -f /dev/VolGroup00/LogVol00 10G

//Reducir el tamaño lógico
# lvm lvreduce -L10G /dev/VolGroup00/LogVol00

Crear la partición home
# lvcreate -L50G -nhome /dev/VolGroup00

Formatearla
mkfs -t ext3 /dev/VolGroup00/home

/etc/fstab

/dev/VolGroup00/home  /home  ext3  suid,dev,exec  0  0

it has path completion and user friendly features:

$lftp sftp://user@server1

/var/log/secure

$ echo $HISTFILE $HISTSIZE $HISTFILESIZE
/home/user/.bash_history 1000 1000

List previous number of history commands
$ history 5
 1033  sudo yum update
 1034  echo $HISTFILE $HISTSIZE $HISTFILESIZE
 1035  history
 1036  echo $HISTFILE $HISTSIZE $HISTFILESIZE
 1037  history 5

Ctrl + r to search a string history

$yum list available

$ yum grouplist

Command and Sample Output  ::  Description

Show the first mount command in PATH:
$ type mount
mount is /bin/mount

Show binary source, and man pages for mount:
$ whereis mount
mount: /bin/mount /sbin/mount.cifs /sbin/mount.nfs /sbin/mount.nfs4
/usr/share/man/man2/mount.2.gz /usr/share/man/man8/mount.8.gz

Find bash.ps anywhere in the file system
$ locate bash.ps
/usr/share/doc/bash-3.1/bash.ps
/usr/share/doc/bash-3.1/rbash.ps

Find the umount command anywhere in your PATH or aliases
$ which umount
/bin/umount

Find umount in any installed package
$ rpm -qal |grep umount
/usr/share/man/es/man2/umount.2.gz
/sbin/umount.nfs
/sbin/umount.nfs4

Finds bzfs in the bzflag package
$yum install bzflag

find man pages for commands related to a certain word
$apropos crontab

show NAME lines alone for commands
$whatis cat

Introduction

To update the system applying the most recent corrective patches of security and to the operating system is not as difficult as many do not suppose, nor either must be a hell of dependencies between packages RPM as some others argue. The reality of the things is that it is much very simple and single requires of good bandwidth or very many patience. Next we presented/displayed the procedures to use yum and to make easily what some denominate “horrible, difficult and complicated “.
Read more… »

locally checks for signs of a rootkit:
CHKROOTKIT
http://www.chkrootkit.org/download/

5. Installation
 —————
 To compile the C programs type:

 # make sense

 After that it is ready to use and you can simply type:

 # ./chkrootkit