check your:
-firewall configuration
-dns settings
-network adress
(fatal) unable to fetch file tiers. cpanel installation
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Author Archives: bentoslack
windows 7 error code 0xc0000225
If we have to install windows 7 virtual machine with virtualbox just enable IO APIC from virtual machine settings
upgrade ubuntu 12.04 precise to ubuntu 12.10 quantal
aptitude install update-manager-core
vim /etc/update-manager/release-upgrades
we have to change Promt=lts to Promt=normal
sudo apt-get updade
do-release-upgrade -d
error: ‘system’ was not declared in this scope | g++
error: ‘system’ was not declared in this scope
we need
#include <cstdlib>
error: ‘stdin’ was not declared in this scope | error: ‘fflush’ was not declared in this scope
error: ‘fflush’ was not declared in this scope
error: ‘stdin’ was not declared in this scope
we need
include <cstdio>
‘strlen’ was not declared in this scope | ‘strcpy’ was not declared in this scope
when we are migrating source code from windows on linux machine g++ prints the following errors
error: ‘strlen’ was not declared in this scope
error: ‘strcpy’ was not declared in this scope
we have to add #include <cstring>
now, strlen() and strcpy() will work correctly
mod_evasive prevent DOS attacks on apache webserver
aptitude search mod-evasive
p libapache2-mod-evasive – evasive module to minimize HTTP DoS or brute force attacks
aptitude install libapache2-mod-evasive
mkdir -p /var/log/apache2/evasive
chown -R www-data:root /var/log/apache2/evasive/
vim /etc/apache2/mods-available/mod-evasive.load
LoadModule evasive20_module /usr/lib/apache2/modules/mod_evasive20.so
DOSHashTableSize 3097
DOSPageCount 5
DOSSiteCount 100
DOSPageInterval 2
DOSSiteInterval 2
DOSBlockingPeriod 600
DOSLogDir “/var/log/apache2/evasive”
DOSEmailNotify [email protected]
apachectl configtest
Syntax OK
apachectl restart
suhosin.session.encrypt: NOT OK(is ’1′, should be ’0′) roundcube setup failed
vim /etc/php5/conf.d/suhosin.ini
suhosin.session.encrypt = off
apachectl restart
aptitude install php5-mcrypt php5-imap php5-intl
vim /etc/php5/apache2/php.ini
date.timezone =Europe/Sofia
apachectl restart
dtrx – Do The Right Extraction
tool for lazy admins 🙂
aptitude install dtrx
check linux configuration files syntax for errors
| OpenSSH | /usr/sbin/sshd -t && echo $? /usr/sbin/sshd -T |
| Apache | /usr/sbin/apache2 -t apachectl configtest |
| nginx | /usr/local/nginx/sbin/nginx -t /usr/local/nginx/sbin/nginx -t -c /usr/local/nginx/conf/nginx.conf |
| lighttpd | /usr/local/sbin/lighttpd -t -f /usr/local/etc/lighttpd/cyberciti.biz/lighttpd.conf |
| Bind (named server config) | named-checkconf /etc/named.conf |
| Bind (zone syntx) | named-checkzone cyberciti.biz /var/named/zone.cyberciti.biz |
| Squid proxy | /usr/sbin/squid -k check /usr/sbin/squid -k parse |
| MySQL server | mysqld –verbose –help /usr/libexec/mysqld –verbose –help 1>/dev/null |
| Postfix MTA | postfix check postfix -vvv |
| Samba SMB/CIFS | testparm -v |
| tcpd | tcpdchk tcpdchk -v |
| dhcpd (DHCP / BOOTP) server | dhcpd -t -cf /path/to/dhcpd.testing.conf |
| vsftpd server | vsftpd -olisten=NO /path/to/vsftpd.testing.conf |
| nagios | nagios -v /path/to/testing/nagios.cfg |
| Openntpd NTPD server | ntpd -d -f /usr/local/etc/ntpd.conf -n |
| Xorg (X11 Server) | Xorg -config /path/to/xorg.conf.new -retro |
| syslogd / rsyslogd | rsyslogd -c4 -f /etc/rsyslog.testing.conf -N 1 |
| CUPS Printing System | cupsd -f -c /path/to/cupsd.testing.conf -t |
| slapd (OpenLDAP) | slapd -Tt |
| varnishd | varnishd -C -f /path/to/wordpress.vlc |
| exim MTA | exim -bV |
| Bash/Ksh scripts | bash -n ./myscript ksh -n /path/to/script.ksh |
| BSD pf firewall | pfctl -nf /etc/pf.conf |
| proftpd | proftpd -t -c /path/to/proftpd.testing.conf |
| Perl scripts | perl -c /path/to/script.pl perl -wc /path/to/script.pl |
http://www.cyberciti.biz/tips/check-unix-linux-configuration-file-for-syntax-errors.html