Basic Linux Commands
Viewing, copying, moving and deleting files
| ls | Display the contents of the current directory |
| ls -a | Display also hidden files and hidden directories |
| cp filename /path/dir_name | Copy filename into directory /path/dir_name |
| cp -r dir_name /path/dir_name2 | Copy the entire dir_name into /path/dir_name2 |
| cp filename1 filename2 /path/dir_name | Copy filename1 and filename2 into /path/dir_name |
| rm name | Remove a file or directory called name |
| rm -r name | Remove an entire directory as well as its included files and subdirectories |
| mv filename /path/dir_name | Move filename into /path/dir_name |
| mv filename1 filename2 | Rename filename1 to filename2 |
| cat filename | Display filenames contents |
| more filename | Display filename in pages. Use spacebar to view next page |
| head filename | Display filenames first 10 lines |
| head -15 filename | Display filenames first 15 lines |
| tail filename | Display filenames last 10 lines |
| tail -15 filename | Display filenames last 15 lines |
| pwd | Display current directory |
| cd /path/dir_name | Change to directory /path/dir_name |
| cd .. | Go 1 directory up |
| mkdir dir_name | Create directory dir_name |
| rmdir dir_name | Delete directory dir_name |
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How to open winrar files on Linux (Fedora/Ubuntu)
I just downloaded .rar file. But i can’t open it under my Fedora operating systems. How to open it?
RAR is a proprietary compression format widely used today. By default, Fedora unable to open RAR files. So, you need to install a software called unrar.
How to install unrar on Fedora?
Just use yum command as follows : Read more
How to Change, set or change MySQL root Password
Once you installed MySQL, you might need to set the MySQL root password to protect your DB. Actually how to do that?
Just type the following command on your terminal
[root@techkaki] # mysqladmin -u root password NEWPASSWORD
However, if you want to change (or update) a root password, then you need to use following command
[root@techkaki] # mysqladmin -u root -p 'oldpassword' password newpass
Eg:
[root@techkaki] # mysqladmin -u root -p 'abcdef' password '123456'
