When grown from seeds, romaine lettuce takes only a little less than 3 months to fully mature. You can tell when the heads are mature by their visual appearance: they'll have a dark green color and look leafy and open. Unlike iceberg lettuce, the romaine heads will not be densely closed in upon themselves when mature. If you'd like to harvest the entire romaine head at once, use a sharp pair of gardening shears to snip through the base of the romaine. Make the cut about 1 inch (2.5cm) above the surface of the soil. Be careful not to cut through any rocks or soil, or you'll end up dulling the blades of your shears. When you cut off the entire head at once, the roots of the romaine will often produce additional lettuce leaves. After they grow and mature, you'll be able to glean a second harvest. You can expect to wait another 5560 days for the second harvest. However, these leaves will not form another "head" shape, and will be looser and less numerous than the lettuce leaves on the initial romaine head. If you'd rather not have a second harvest of lettuce, you can harvest the entire head of lettuce at once. You won't need gardening shears for this. Just grasp the base of the lettuce head with one hand, and firmly pull upward until it dislodges from the ground. Pulling up the full romaine head will bring the roots out of the ground as well. In order to leave the garden patch relatively undisturbed, and to avoid bringing dirt indoors, remove excess dirt from the romaine's roots. You can do this with either hand while you're pulling the lettuce head up from the ground. Once the lettuce is uprooted, pat the dirt back in place so there isn't a hole left in the garden patch. You can also dig around in the soil a bit to remove any leftover roots that may be stuck in the soil. If left in the soil, these leaves may re-sprout and grow more romaine. Once you've brought the lettuce head inside, break it apart by pulling each individual leaf away from the head's base. Then rinse the individual leaves under cool tap water. You can serve the lettuce immediately in a garden salad, or keep the leaves for up to 10 days in an airtight bag in your fridge.
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One-sentence summary -- Harvest the romaine heads about 6570 days after planting the seeds. Cut the entire head off above the base if you want a second harvest. Give the lettuce time to re-sprout leaves after the first harvest. Pull the romaine head out of the ground to ensure a single harvest. Break any clumps of dirt off of the roots. Break apart the lettuce head and rinse the individual leaves.

Hold your hand out straight and naturally extend all four fingers. Firmly press all four fingers together, leaving the thumb loose. Your hand should stick straight out as though you are extending it for a handshake. Squeeze your fingers together with just enough pressure to turn them into a solid mass. They should not hurt or feel stiff, but there should be no spaces or gaps between them. Bend your fingers into your palm, curling them under until the tip of each finger touches its corresponding base. You are bending your fingers at the second joint during this step. Your nails should be clearly visible, and your thumb should remain loose at the side of your hand. Continue curling your fingers in the same direction so that the bottom knuckles are brought out and the finger joints are tucked in. During this step, you will actually bend the third and outermost knuckles of your fingers. Your nails should partially disappear into your palm. Your thumb should still hang loose during this step. Bend the thumb down so that it falls across the top halves of the index and middle fingers. The exact placement of the thumb isn't too crucial, but it must be tucked under and should never hang loose. If you press the tip of the thumb to the fold of the second knuckle of your index finger, you may actually minimize the risk of damaging the bones in your thumb. Tucking the thumb under the index and middle finger works well and is a more common tactic, but you must make sure that it remains relaxed as you strike. A tense thumb will pull the bones at the base of your hand down and apart, which may increase your risk of developing a wrist injury.
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One-sentence summary -- Extend all four fingers. Curl your fingers. Curl your bent fingers inward. Fold the thumb down.

Linux is designed so that you can perform administrator tasks without actually logging in as the administrator, or "root", user. As such, it is highly recommended that you use the sudo command to perform actions that require root access instead of logging in as root. Since you can use sudo combined with your own user password to make root changes, you don't actually need to set a root password. If you do want to set one, read on. You'll be changing the password through the Terminal, which can be opened from the task bar or by pressing Ctrl+Alt+T. sudo passwd and press Enter. You will be prompted for your user password. After entering your user password, you'll be prompted to create the new root password. You'll be prompted to enter it twice to confirm it. You won't see the password on the screen as you type it.
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One-sentence summary --
Understand the risks before proceeding. Open the Terminal. Type . Enter your new root password.