Linux and UNIX Systems Configuration Help, How To, Tutorial and Basic Information

1. tar

Command tar Creates archive files or extract files from archives. Syntax tar [options] file_or_directory Options -c creates a new archive. -d compares the files from the archive files from the ...

2. rmdir

Command rmdir Deletes the specified directory (if it is empty). Syntax rmdir [options] directory Options -p remove all parent directories which become empty. Description The command rmdir ...

3. rm

... contained in the catalog. -v displays the names of the files before deleting them. Description The rm command removes the specified files. To delete a file, you must have the right to record the directory ...

4. pwd

Command pwd Prints the current working directory. Syntax pwd Options No Description The command pwd prints the current working directory. It is a built-in command of Bash.  ...

5. mv

Command mv Renames files and directories or move them from one directory to another. Syntax mv [options] source destination Options -b creates backup copies of files that are moved or renamed. ...

6. mkdir

Command mkdir Creates a directory. Syntax mkdir [options] directory_names Options -m access appoints new directory specified access rights. -p creates parent directories if they do not exist. ...

7. ls

Command ls Prints the contents of the directory. Syntax ls [options] [directory-names] Options -a displays all files, including those with names starting with a dot (.). -b displays unprintable ...

8. ln

... a directory (this can be done only by root). -f remove existing file named newname. -help displays help for the team. -s creates a symbolic link. -v generates detailed output information. Description ...

9. info

Command info info command displays online help for any command Linux. Syntax info [options] command Options -d add the directory to the list of directories in which files are being explored.  ...

10. find

Command find find command displays a list of files that match a given set of criteria. Syntax find [path] [options] Options -depth first processing the current directory, then its subdirectories. ...

11. file

... the file command uses the rules specified in the file /usr/lib/magic. For example, using the command file you check the type of each file in the directory /usr/lib as follows: file * | more  ...

12. du

... -s displays summary information on the use of disk space without directory information. Description The du command displays the amount of disk space (in kilobytes) occupied by the specified files or ...

13. cp

Command cp cp command copies files and directories. Syntax cp [options] source_file destination_file cp [options] source_file destination_directory Options -a preserves all the attributes of a ...

14. chmod

...  g group - delete w write o others = assign x execute a all s set user ID   To grant read access to all files in directory, type chmod a+r *. For permit the ...

15. cd

Command cd cd command changes the current directory. Syntax cd [directory] Options No Description The command cd without the directory name changes the current directory to home directory ...

16. Files, Folders Management

... directory total size # du -ch /home/rommel/bachup | grep total Change file mode # chmod 777 kkk.txt Change directory mode recursive (with subfolders) # chmod 777 mydir -R ...

17. File Server With Samba and FTP in FreeBSD

... testa can read and write in admin (FTP only) and public directories. User testu can read and write in the public directory and can read admin directory. In this example were used: FreeBSD 7.2 ...

18. Linux, UNIX User Management Commands

...    ch passwd Update password file in batch.     chroot Run command or interactive shell with special root directory.     chsh Change the ...

19. alias

... the command ls-l, can add to the file. bashrc in your home directory with the command line alias ll = 'ls -L '. Then, to view a detailed table of contents directory instead of ls-l command can enter the ...

20. Linux, UNIX Directories

Mount Point Explanation / Root directory /bin Main program /boot Used at boot /dev directory Where the registered user devices (modem, mouse, keyboard, etc.) /etc ...