Linux Server and Workstation Configuration How To

1. IPv6 Configuration on Ubuntu Linux

... will get message with Username, Password and Gateway6 Address. Now lets start server configuration. By default, in ubuntu-server IPv6 support is already enabled. In other case you can enable by command: ...

2. Internet gateway on FreeBSD

... To do this, recompile the kernel with support for multiple functions. Go to the directory corresponding to the architecture of our CPU and make a copy of the default kernel as ROUTER: # cd / # cp ...

3. ipfw nat on FreeBSD 7

In the kernel configuration add: options IPFIREWALL # firewall options IPFIREWALL_VERBOSE # enable logging to syslogd (8) options IPFIREWALL_DEFAULT_TO_ACCEPT # allow everything by default options ...

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

...  # kernel /boot/vmlinuz-version ro root=/dev/hdc1 # initrd /boot/initrd-version.img #boot=/dev/hdc default=0 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title ...

5. top

... with their share use of CPU time. By default, top updates every 5 seconds. For the termination of top press <q> or <ctrl-s>.  ...

6. tail

... reads a file at specified intervals and displays the new line. Description tail command displays the last lines of the file. By default last 10 lines of the file.  ...

7. man

Command man Print page operational manual (also called man-pages). Syntax man [options] [section] command Options -C conf_file indicates configuration file man (by default /etc/man.config). -p ...

8. ls

... current directory. By default, ls does not display files with names which begin with a dot (.) to see all the files, type ls -a. Detailed information about the files (including size, ownership and group ...

9. kill

... and names of signals. Description The kill command sends a signal to the process. The signal default kill signal is TERM Usually this signal is designed to complete the process. For example, kill -9 ...

10. head

... of the file file. The default number of rows is equal 10. Number of output lines can be specified with option -n.  ...

11. free

... (default). -m displays the amount of memory in megabytes. -sn command repeats every n seconds. -t displays the string with the total number of free and used memory. Description The free command ...

12. file

... a specified magic file (or file by default) and exits. -m file1 [: file2: ... ] Indicates that other magic files. -z scans compressed files. Description To determine the type of data in these files, ...

13. du

... files (not only for directories). -b displays the information in bytes (rather than in kilobytes). -c displays summary information on the use of disk space. -k displays the information in kilobytes (default). ...

14. dos2unix

... mode: ASCII (default), 7bit, ISO, Mac. Description Dos2unix command is used to convert the formats of text files DOS/Mac to UNIX format. It is known that the formats of text files in different operating ...

15. cut

... list list. -f selects the list of fields (separated by tabs) specified in the list list. -d symbol indicates a field separator character (default is the tab character). -s skip lines that do not contain ...

16. cmp

... input. By default, cmp does not issue any messages if the files coincide if the files differ, prominent position in the line and the line number in which is the first mismatched byte. If one of the files ...

17. How To Securing SSH Connection

... optionally edit the good default configuration in /etc/denyhosts.conf:You can install denyhosts by this steps yum install denyhosts chkconfig denyhosts on /etc/init.d/denyhosts start Change the default ...

18. 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.

19. How to Compile Kernel (CentOS 2.6.19)

...  # -default Then exit, (close app) Selete YES when question do you want to save ...? # make rpm # ls -l /usr/src/redhat/SRPMS/ # ls -l /usr/src/redhat/RPMS/i386/ # cd /usr/src/redhat/RPMS/i386/ # rpm ...

20. Linux, UNIX User Management Commands

... a user can run.     useradd Create a new user or update default new user information.     userdel Delete a user account and related files.   ...