Basic Linux Commands

February 17, 2010 · Posted in Fedora, Linux, Ubuntu, centos · Comment 

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)

January 4, 2010 · Posted in Fedora, Open Office, Ubuntu, Unix · Comment 

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

October 26, 2009 · Posted in Fedora, Open Source, Ubuntu, Unix, centos · Comment 

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'

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