Linux Server and Workstation Configuration How To

21. kernel: irq 153: Please try booting with acpi=off and report a bug

Problem Tested on CentOS 4.8 kernel: irq 153: Please try booting with acpi=off and report a bug Apr 2 11:14:17 localhost kernel: irq 153: nobody cared! (screaming interrupt?) Apr 2 11:14:17 localhost ...

22. ldd

... of the dynamic linker (ld.so), -d reallocates functions and reports the missing features. -r redistributes the data and functions, reports of missing objects. Description The command ldd to determine ...

23. chgrp

... -v detailed reports on the changes the group owner. -R recursively changes the group ownership of files in all subdirectories. Description To change the group owner of one or more files, type chgrp ...

24. How to Export, Backup Or Dump A MySQL Database

To export a MySQL database into a dump file, simply type the following command syntax in the shell. mysqldump -u username –ppassword database_name > dump.sql Replace username, password, database_name ...

25. How to Export A MySQL Database Structure

If You need to export only the MySQL database's tables’ structures use –no-data switch. mysqldump -u username -ppassword –no-data database_name > dump.sql ...

26. How to Backup Only Data of a MySQL Database

For exporting MySQL database's only the data, use –no-create-info option. The dump will not re-create the database, tables, fields, and other structures when importing. mysqldump -u username -ppassword ...

27. How to Export A MySQL Database Structures

If You need to export only the MySQL database's tables’ structures use –no-data switch. mysqldump -u username -ppassword –no-data database_name > dump.sql ...

28. How to Dump Several MySQL Databases Into Text File

Use –databases option for exporting several databases. mysqldump -u username -ppassword –databases db_name1 [db_name2 ...] >dump.sql ...

29. How to Online Backup Innodb Tables

Backup the database inevitable cause MySQL server unavailable to applications because when exporting, all tables acquired a global read lock using FLUSH TABLES WITH READ LOCK at the beginning of the dump ...

30. How To Restore and Import MySQL Database

You should upload the dump file to the MySQL server, and type this command to import the databases into the MySQL server. mysql -u username –p password database_name < dump.sql ...

31. How To Securing SSH Connection

... port - Edit /etc/ssh/sshd_config config file by your favorite text editor and change the line which reads "Port 22" to any other unused port. #Port 22 Port 2223 Disable Protocol 1 which is insecure ...

32. How to get Default Port Numbers

To View a port number type in terminal for full list: cat /etc/services for one you need: cat /etc/services | grep (port number or service) View /etc/services file.  ...

33. How to Install Google Chromium on Ubuntu

... Intrepid, since in this example, the older version of Ubuntu 9.04 is not supported. Now we have a line APT, and you can import the key GPG, to confirm the download. Chromium is installed and so, but we ...

34. Send Mail Script

Mail content text is /tmp/message.txt # mail -s 'Server Status Report' george@example.com -c Jon@example.com < /tmp/message.txt Send Mail With Attachment # !/bin/bash # tar -zcf /tmp/backup.tar.gz ...

35. Creating Transparent Proxy With squid and iptables

For creating transparent proxy we need edit squid.conf and add iptables rules. Edit /etc/squid.conf file with your favorite editor, example vi # vi /etc/squid.conf Add or change this lines. http_port ...

36. Linux, UNIX User Management Commands

... set to emacs, the emacs editor will be used. Type "export EDITOR=emacs" to set that variable.     faillog Examine faillog and set login failure limits.     finger ...

37. Network Information and Configuration Commands

... # netstat -ntulp Detailed Network Connections Information # lsof -i -n -P Check Port : 9991 for ip 83.139.15.58 # nmap -v -p 9991 83.139.15.58 Get Port Information. (9111 is the port) # cat /etc/services ...

38. Default Port Numbers

Here are listed default port numbers (full /etc/services file) # /etc/services: # $Id: etcservices.txt,v 1.2 2005/12/18 13:54:31 francis Exp $ # # Network services, Internet style # # Note that ...

39. Linux, UNIX Directories

... network, etc.) /root Root's directory /sbin Basic system software /tmp Temporary files /usr Directory impracticable important files /var Various data (logs)  ...

40. OSI Model

... for application layer Provides encryption         5 Session Interhost Communication   Establishes, manages, and terminates sessions between applications         4 Transport ...