Here are some comman linux commands.

• Zip a file or folder

  • To Zip a folder:

    #zip -9 -r <zip file> <folder name>

  • To zip a single file:

    #zip -9 <zip file> <filename>

    Use "-9" for best compression. The compressed file works fine with Windows XP compression tool.

•  Tar and Gzip archive command syntax:

  • Backup folder1 and folder2 directories and preserve files permission into tarball file named backup.tar
    #tar -cvpf backup.tar folder1 folder2
    *****extracting a tarball
    #tar -xvpf backup.tar

    Backup folder1 and folder2 directories and preserve files permission into tarball file named backup.tar (gzip is compressing the folder as well)
    #tar -zcvpf backup.tgz folder1 folder2
    *****extracting a gzip compressed tarball file
    #tar -zxvpf bkp.tgz
    
    

.htaccess rewrite rule

RewriteEngine on

RewriteRule ^filenameonly.html$ http://ikeeperonline.com/themain/content/custom-crm-solution [R=permanent,L]

Install the following utils to apply patches to your php code. 

#yum -y install patchutils patch

Applying patch: add the patch file to the location where the file to be modified is located.

#patch < filename.patch

Reversing a patch:

#patch -R < filename.patch