Diagnóstico de memoria RAM a través de Memtest86 3.5

Memtest86, es un producto de http://www.memtest86.com/ que permite realizar un diagnóstico de la memoría RAM disponible de una máquina de arquitectura x86.

Desde la página oficial se puede descargar una ISO quemarla en un CD y arrancar directamente como un sistema operativo arrancable; automáticamente inicia un menú donde te permite seleccionar distintas versiones de compilación que someten a un diagnóstico intensivo la memoria RAM presente en el equipo.

Descargar Memtest86

Rotación de Logs de Blackboard Learn 9

Para completar la rotación de Logs del LVMS Blackboard Learn 9 instalada en arquitecturas Microsoft Windows en un flujograma de procesos se debería

1) Parar servicios de Blackboard

net stop Bb-Collab
net stop Bb-Tomcat

2) Arrancar script de rotación de logs de Blackboard

cd D:\BB\blackboard\tools\admin
RotateLogs.bat

Con la ejecución de este script el proceso optimiza el espacio libre de la unidad donde está instalada el servidor de aplicaciones Apache Tomcat comprimiendo y archivando archivos logs en D:\BB\blackboard\logs\archives.

3) Arrancar servicios de Blackboard

net start Bb-Collab
net start Bb-Tomcat

Rotación de Logs en Linux /etc/logrotate.conf

A través de logrotate puedo realizar un tratamiento personalizado para cada uno de los logs de acceso y error de cada uno los virtual hosts que hospedo en el servidor Apache.

Es una muy buena forma de rotar archivos de logs muy grandes. A posteriori sobre los archivos que van a ser rotados se les aplica factor compresión para que el fichero rotado ocupe menos tamaño.

Contenido del archivo de configuración /etc/logrotate.conf

# see “man logrotate” for details
# rotate log files weekly
weekly

# keep 4 weeks worth of backlogs
rotate 4

# create new (empty) log files after rotating old ones
create

# uncomment this if you want your log files compressed
#compress

# packages drop log rotation information into this directory
include /etc/logrotate.d

# no packages own wtmp, or btmp — we’ll rotate them here
/var/log/wtmp {
    missingok
    monthly
    create 0664 root utmp
    rotate 1
}

/var/log/btmp {
    missingok
    monthly
    create 0660 root utmp
    rotate 1
}

# system-specific logs may be configured here

/var/www/www.XXX.YYY.es/logs/*.log {
  daily
  missingok
  rotate 7
  compress
  delaycompress
  create 640 usuario desarrollador
}

logrotate corre como un demonio cuya ejecución es administrada a través de cron.

Desempaquetar y descomprimir un archivo XXX.tgz / XXX.bz2 en Linux

TGZ

tar xvzf XXX.tar.gz

 BZ2

tar xvjf XXX.tar.bz2

Imágenes de Ficus Microcarpa, 20100307

Estaba de compras por un Hipercor, justo cuando lo ví y me antojé de él.

Como soy un novato y no tenía un precio elevado decidí comprármelo para que acompañase a mi primer bonsai “Serissa Phoetida” y a la par cultivar otro género distinto.

No me fué caro, creo recordar que estaba de oferta y no pagué más allá de 5-7 €.

Desde el deconocimiento total, este es el aspecto que tenía:

Visualmente, tenía una copa frondosa y llena de hojas; no muchas ramas y tampoco de gran longitud, en cuanto a las hojas las había de varios colores y dimensiones.

En la etiqueta que lo acompañaba, el bonsai indicaba que era literalmente un “Ficus Ginseng”; a posteri, traté de indagar más en profundidad para conocer de dónde venía y cómo debía de cuidarlo.

No encontré mucho a través de “Ficus Ginseng” debido a que parece que los venden comercialmente así, lo más cerca que he llegado de identifarlo es como un “Ficus Microcarpa” debido al desarrollo de la copa, el grosor del tronco y el jugo lechoso que desprende por ejemplo cuando le podas o bien un rama o un par de hojas.

Serissa phoetida, 5 años, 201003007

Hoy he transplantado mi Serissa Phoetida a un nuevo recipiente que he hecho a mano con un puñado de piedras, mortero y un armazón metálico hecho de alambre.

Tras limpiar las raíces del árbol de la tierra y el sustrato anterior he agarrado el árbol al recipiente con un par de alambres fijados a los agujeros de drenaje y finalmente he agregado una nueva mezcla de tierra compuesta por akadama, turba rubia y gredas volcánicas.

Sobre los agujeros de drenaje he colocado unas rejillas hechas con plástico perforado para permitan drenar sólo el agua y mantenga la tierra.

Para terminar, he regado el árbol generosamente y he plantado una raíz en un lateral que lamentablemente rompí o se me sólto cuando estaba limpiando las raices.

El resultado es el siguiente…

Configuración básica de /etc/samba/smb.conf

Configuración básica para poner en funcionamiento SAMBA

1º Agregar el mismo usuario y contraseña que hace “logon” en arquitecturas Windows a usuarios locales de samba

linux-01:~# smbpasswd -a salonso
New SMB password:
Retype new SMB password:

2º Acceder al recurso de red \\linux-01\salonso

Por defecto una vez instalado SAMBA, sólo se tiene acceso de lectura sobre el sistema de ficheros de linux.

3º Cambiamos la parametrización de /etc/samba/smb.conf para poder escribir y de paso cambiamos las máscaras de permisos usuario y grupo que se utilizan cuando se genera un nuevo archivo o directorio en el sistema de ficheros.

También cambio el modo de seguridad a “Usuario”.

linux-01:~# cat /etc/samba/smb.conf

#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
#
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
#  – When such options are commented with “;”, the proposed setting
#    differs from the default Samba behaviour
#  – When commented with “#”, the proposed setting is the default
#    behaviour of Samba but the option is considered important
#    enough to be mentioned here
#
# NOTE: Whenever you modify this file you should run the command
# “testparm” to check that you have not made any basic syntactic
# errors.
# A well-established practice is to name the original file
# “smb.conf.master” and create the “real” config file with
# testparm -s smb.conf.master >smb.conf
# This minimizes the size of the really used smb.conf file
# which, according to the Samba Team, impacts performance
# However, use this with caution if your smb.conf file contains nested
# “include” statements. See Debian bug #483187 for a case
# where using a master file is not a good idea.
#

#======================= Global Settings =======================

[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = home

# server string is the equivalent of the NT Description field
   server string = %h server

# Windows Internet Name Serving Support Section:
# WINS Support – Tells the NMBD component of Samba to enable its WINS Server
#   wins support = no

# WINS Server – Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
;   wins server = w.x.y.z

# This will prevent nmbd to search for NetBIOS names through DNS.
   dns proxy = no

# What naming service and in what order should we use to resolve host names
# to IP addresses
;   name resolve order = lmhosts host wins bcast

#### Networking ####

# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
;   interfaces = 127.0.0.0/8 eth0

# Only bind to the named interfaces and/or networks; you must use the
# ‘interfaces’ option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
;   bind interfaces only = yes

#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Cap the size of the individual log files (in KiB).
   max log size = 1000

# If you want Samba to only log through syslog then set the following
# parameter to ‘yes’.
#   syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
   syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d
####### Authentication #######

# “security = user” is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
   security = user

# You may wish to use password encryption.  See the section on
# ‘encrypt passwords’ in the smb.conf(5) manpage before enabling.
   encrypt passwords = true

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
   passdb backend = tdbsam

   obey pam restrictions = yes

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.

# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
   unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# ‘passwd program’. The default is ‘no’.
   pam password change = yes

########## Domains ###########

# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the ‘domain master’ setting to no
#
;   domain logons = yes
#
# The following setting only takes effect if ‘domain logons’ is set
# It specifies the location of the user’s profile directory
# from the client point of view)
# The following required a [profiles] share to be setup on the
# samba server (see below)
;   logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user’s home directory
# (this is Samba’s default)
#   logon path = \\%N\%U\profile

# The following setting only takes effect if ‘domain logons’ is set
# It specifies the location of a user’s home directory (from the client
# point of view)
;   logon drive = H:
#   logon home = \\%N\%U

# The following setting only takes effect if ‘domain logons’ is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in ‘DOS’ file format convention
;   logon script = logon.cmd

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser –quiet –disabled-password –gecos “” %u

# This allows machine accounts to be created on the domain controller via the
# SAMR RPC pipe.
# The following assumes a “machines” group exists on the system
; add machine script  = /usr/sbin/useradd -g machines -c “%u machine account” -d /var/lib/samba -s /bin/false %u

# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.
; add group script = /usr/sbin/addgroup –force-badname %g

; add group script = /usr/sbin/addgroup –force-badname %g

########## Printing ##########

# If you want to automatically load your printer list rather
# than setting them up individually then you’ll need this
#   load printers = yes

# lpr(ng) printing. You may wish to override the location of the
# printcap file
;   printing = bsd
;   printcap name = /etc/printcap

# CUPS printing.  See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
;   printing = cups
;   printcap name = cups

############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
   SO_RCVBUF=8192 SO_SNDBUF=8192
   socket options = TCP_NODELAY

# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
;   message command = /bin/sh -c ‘/usr/bin/linpopup “%f” “%m” %s; rm %s’ &

# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to ‘no’; otherwise, the default behavior is recommended.
#   domain master = auto

# Some defaults for winbind (make sure you’re not using the ranges
# for something else.)
;   idmap uid = 10000-20000
;   idmap gid = 10000-20000
;   template shell = /bin/bash

# The following was the default behaviour in sarge,
# but samba upstream reverted the default because it might induce
# performance issues in large organizations.
# See Debian bug #368251 for some of the consequences of *not*
# having this setting and smb.conf(5) for details.
;   winbind enum groups = yes
;   winbind enum users = yes

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.

# with the net usershare command.

# Maximum number of usershare. 0 (default) means that usershare is disabled.
;   usershare max shares = 100

#======================= Share Definitions =======================

[homes]
   comment = Home Directories
   browseable = no

# By default, the home directories are exported read-only. Change the
# next parameter to ‘no’ if you want to be able to write to them.
   read only = no

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
   create mask = 0770

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
   directory mask = 0770

# By default, \\server\username shares can be connected to by anyone
# with access to the samba server.
# The following parameter makes sure that only “username” can connect
# to \\server\username
# This might need tweaking when using external authentication schemes
   valid users = %S

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
;[netlogon]
;   comment = Network Logon Service
;   path = /home/samba/netlogon
;   guest ok = yes
;   read only = yes
;   share modes = no

# Un-comment the following and create the profiles directory to store
# users profiles (see the “logon path” option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
;   comment = Users profiles
;   path = /home/samba/profiles
;   guest ok = no
;   browseable = no
;   create mask = 0600
;   directory mask = 0700

[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = yes
   guest ok = no
   read only = yes

   guest ok = no
   read only = yes
   create mask = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
[print$]
   comment = Printer Drivers
   path = /var/lib/samba/printers
   browseable = yes
   read only = yes
   guest ok = no
# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace ‘lpadmin’ with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
;   write list = root, @lpadmin

# A sample share for sharing your CD-ROM with others.
;[cdrom]
;   comment = Samba server’s CD-ROM
;   read only = yes
;   locking = no
;   path = /cdrom
;   guest ok = yes

# The next two parameters show how to auto-mount a CD-ROM when the
#       cdrom share is accesed. For this to work /etc/fstab must contain
#       an entry like this:
#
#       /dev/scd0   /cdrom  iso9660 defaults,noauto,ro,user   0 0
#
# The CD-ROM gets unmounted automatically after the connection to the
#
# If you don’t want to use auto-mounting/unmounting make sure the CD
#       is mounted on /cdrom
#
;   preexec = /bin/mount /cdrom
;   postexec = /bin/umount /cdrom

4º Reinicio el servicio para que se apliquen los nuevos cambios.

linux-01:~# /etc/init.d/samba restart
Stopping Samba daemons: nmbd smbd.
Starting Samba daemons: nmbd smbd.

Configuración /etc/apt/sources.list stable

linux-01:~# cat /etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux 5.0.3 _Lenny_ - Official i386 CD Binary-1 20090905-08:23]/ lenny main

#deb cdrom:[Debian GNU/Linux 5.0.3 _Lenny_ - Official i386 CD Binary-1 20090905-08:23]/ lenny main

# Line commented out by installer because it failed to verify:
#deb http://security.debian.org/ lenny/updates main
# Line commented out by installer because it failed to verify:
#deb-src http://security.debian.org/ lenny/updates main

# Line commented out by installer because it failed to verify:
#deb http://volatile.debian.org/debian-volatile lenny/volatile main
# Line commented out by installer because it failed to verify:
#deb-src http://volatile.debian.org/debian-volatile lenny/volatile main

deb http://security.debian.org/ stable/updates main
deb-src http://security.debian.org/ stable/updates main

deb ftp://ftp.us.debian.org/debian/ stable main
deb-src ftp://ftp.us.debian.org/debian/ stable main

Configuración /etc/network/interfaces

linux-01:~# cat /etc/network/interfaces
######################################################################
# /etc/network/interfaces — configuration file for ifup(8), ifdown(8)
#
# A “#” character in the very first column makes the rest of the line
# be ignored. Blank lines are ignored. Lines may be indented freely.
# A “\” character at the very end of the line indicates the next line
# should be treated as a continuation of the current one.
#
# The “pre-up”, “up”, “down” and “post-down” options are valid for all
# interfaces, and may be specified multiple times. All other options
# may only be specified once.
#
# See the interfaces(5) manpage for information on what options are
# available.
######################################################################

# We always want the loopback interface.
#
# auto lo
# iface lo inet loopback

# An example ethernet card setup: (broadcast and gateway are optional)
#
auto eth0
iface eth0 inet static
     address 192.168.0.100
     network 192.168.0.0
     netmask 255.255.255.0
     broadcast 192.168.0.255

auto wlan0
iface wlan0 inet static
     address 192.168.1.100
     network 192.168.1.0
     netmask 255.255.255.0
     broadcast 192.168.1.255
     gateway 192.168.1.1
     dns-nameservers 192.168.1.1
     pre-up ifconfig wlan0 up
     pre-up iwconfig wlan0 essid JAZZTEL_E5
     pre-up iwconfig wlan0 key s:XXXXXXXXXXXX