Linux Server and Workstation Configuration How To

1. Internet gateway on FreeBSD

... you store HTML c text errors error_directory /usr/local/etc/squid/errors/Russian-1251 cache_log /var/log/squid/cache.log # Debug_options ALL, 5 pid_filename /var/log/squid/squid.pid # Ports on ...

2. vi editor commands

... the vi text editor to edit the file filename a Add text after the cursor h Moves the cursor one character left j Moves the cursor down one line k Moves the cursor up one ...

3. more

Command more Performs view text files. Syntax more [options] file_names Options +N (where N - number) displays the file, starting at the specified line number. +/pattern begins with a display ...

4. less

Command less less command displays text files (with the possibility of searching through back). Syntax less [options] file_name Options -? displays a list of commands that can use less. -p displays ...

5. info

... -f file_info specifies the file used by the team info. -h displays the information on the application info. Description Info command displays online help for this team in full text box. For more information ...

6. grep

... only whole words. Description The command grep searches for a template in these files. Typically, the grep command used to search a specified sequence of characters in one or more text files.  ...

7. dos2unix

Command dos2unix dos2unix command converts a text file format DOS/Mac to UNIX format. Syntax dos2unix [options] [-o file ...] [-n source_file destination_file ...] Options -h displays help about ...

8. diff

Command diff diff command shows the differences between two text files (or all files with the same names in two different directories). Syntax diff [options] first_file a second_file Options -a ...

9. cut

Command cut cut command copies the selected part of each line of a text file on stdout output. Syntax cut [options] file Options -b list selects the characters in the positions specified in the ...

10. 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

11. 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 ...

12. Files, Folders Management

... file(s) # rm *.txt # rm lala.txt Create text file # touch /tmp/myfile Show current path # pwd Show full path of application # which php # which ffmpeg # which httpd Copy file cp /root/install.log ...

13. How to Compile Kernel (CentOS 2.6.19)

... ro root=/dev/VolGroup00/LogVol00 initrd /initrd-2.6.19.default.img Change the `default=1` to `default=0` on the top of the text. Now configure the grub boot loader via vim command and add the following ...

14. 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 ...

15. Default Port Numbers

...  finger 79/tcp www 80/tcp http # WorldWideWeb HTTP www 80/udp # HyperText Transfer Protocol link 87/tcp ttylink kerberos 88/tcp kerberos5 krb5 # Kerberos v5 kerberos 88/udp kerberos5 ...