LABORATORY FORTIFIED BLANK (LFB) - An aliquot of reagent water or other blank matrix to which known quantities of the method analytes and all the preservation compounds are added.
add a comment |. up vote 2 down vote. 1  Go to the command line and get into the directory you want to move it to with cd folderNamehere. 2  Type pwd. 3  This will print the directory you want to move it too.4  Then change to the directory where all of the files are with cd folderNamehere.dd a comment |. up vote 2 down vote. 1  Go to the command line and get into the directory you want to move it to with cd folderNamehere. 2  Type pwd. 3  This will print the directory you want to move it too.
Instructions. Open a terminal window or log into the computer via an SSH prompt. Type the command su - to switch to the root user. Ubuntu users, skip this step and type sudo before the next command. Type the command vi rc.local to open the rc.local file in the Vi text editor.You can replace vi with your preferred text editor. Type the path to the script you want to run at the bottom of the file on its own line.For example, if your script is stored in your home directory type. /home/your_username/start_script. at the bottom of the rc.local file.nstructions. Open a terminal window or log into the computer via an SSH prompt. Type the command su - to switch to the root user. Ubuntu users, skip this step and type sudo before the next command. Type the command vi rc.local to open the rc.local file in the Vi text editor.