Vi beginning of file

Splitting week start date and end date based on custom period start dates. Below are my custom period start and end dates based on a calender, these dates are placed in a file, for each period i need to split into three weeks for each period row, example is given below.

Could you please help out to achieve solution through shell script.. File content Shell Programming and Scripting. How to tell UNIX to start from the oldest file? Hello, I have a simple while loopinside the script and I wish to tell unix to start reading from the oldest txt file. So, in case some new txt files are transferred into the same folder, the script will not take into consideration until all older files are completely processed.

How may I do this? Hi, I have a log file log. I need to create a script to extract a CSV file out. Sample log file log. How to append data in file at start of file? In unix - how to append data in start of file? Please advise. Thanks 5 Replies. Arun P Johny k 62 62 gold badges silver badges bronze badges. Fred Thomsen Fred Thomsen 1, 2 2 gold badges 13 13 silver badges 15 15 bronze badges.

ROOT Works fine in AIX — Shreyas. Works in FreeBSD. Community Bot 1 1 1 silver badge. Subhashree Pradhan Subhashree Pradhan 4 4 silver badges 14 14 bronze badges.

WesternGun WesternGun 8, 64 64 silver badges bronze badges. Rahul Singh Rahul Singh 1 1 silver badge 6 6 bronze badges. Very useful to go to any line in the file. Boergler Boergler 1 1 silver badge 5 5 bronze badges. Works in both insert and nav modes. Details about how we use cookies and how you may disable them are set out in our Privacy Statement. By using this website you agree to our use of cookies. Emacs" by mrbill is licensed under CC BY 2.

This advanced, yet simple to use, command line editing program shows no sign of slowing down. You can use it to edit configuration files, create a grocery list, write a letter home to ask for money, create a new script, or even to edit source code. The vi editor has two modes: Command and Insert. When you first open a file with vi, you are in Command mode. Command mode means that you can use keyboard keys to navigate, delete, copy, paste, and do a number of other tasks—except entering text.

To enter Insert mode, press i. In Insert mode, you can enter text, use the Enter key to go to a new line, use the arrow keys to navigate text, and use vi as a free-form text editor.

If the arrow keys don't work for you, you can use the following substitutes:. To move left, press h. To move right, press l. Press W or B to move the cursor past the adjacent punctuation to the next or previous blank space. Press the Return key to move the cursor to the beginning of the next line down.

Press the Back Space key to move the cursor one character to the left. Press the Space Bar to move the cursor one character to the right. If you move down when the cursor is at the bottom of the screen, or move up when the cursor is at the top of the screen, you will see the text scroll up or down.

This scrolling can be an effective way to display more text in a short file, but it can be tedious to move this way through a long file. You can page or scroll backward or forward through a file, a screen or a half-screen at a time. To try out these commands on paint , you might want to add text so you have a longer file to work with.

Note that paging and scrolling are fundamentally different. Scrolling actually scrolls the cursor up or down through the text a line at a time, as though it were on a paper scroll. Paging moves the cursor up or down through the text a screenful at a time. On a fast system, you might not notice the difference.

However, if you're working from a remote terminal or in any other situation where your system is running slower than usual, this difference can become painfully apparent. To scroll forward move down one screenful, press Ctrl-F. Hold down the Control key and press the F key. The cursor moves to the upper left corner of the new screen. To scroll forward one half of a screen, press Ctrl-D. To scroll backward that is. To scroll backward one half of a screen, press Ctrl-U. This section introduces you to the most useful of these commands.

Note that each of these commands places vi in entry mode. To use any of these commands, you must first be in command mode. Remember to press Esc to make sure you are in command mode. Type a append to insert text to the right of the cursor. Experiment by moving the cursor anywhere on a line and typing a , followed by the text you want to add. Press Esc when you're finished. Type A to add text to the end of a line.

To see how this command works, position the cursor anywhere on a text line and type A. The cursor moves to the end of the line, where you can type your additions. Press Esc when you are finished.

Insert text to the left of the cursor by typing i from command mode. Type I to insert text at the beginning of a line. The command moves the cursor from any position on that line.