working with 1st or last characters of every line in vim

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Remove the last char from every line

Insert a * in the beginning/end of every line

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command > some_file.txt 2>&1

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What does 2>&1 do in a linux console?

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Change the default editor

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I ran into this with CentOS 5. Where the default editor for the system is set to nano! I like vi and wanted to change the default to it. login to the system vi .bashrc Add the following two lines to .bashrc

run the command, source .bashrc A change to /etc/bashrc will make it a system wide change

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Block insert with vim

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Vi block insert (i.e // in front of a block of lines)

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Virtualbox dhcp set

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Simple all mail relay

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You have a server who’s IP is already white listed on your mail server & you wanted this server to pass all outgoing mails to the company’s mail server. This method basically eliminates the need for a mail server to be running on the local box.

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increase the loop device count

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Put a time stamp in history

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Auto start services

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