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Prefix every line with a timestamp
Useful to add a timestamp to every line printed to stdout. You can use `-Ins` instead of `-Iseconds` if you want more precision.

copy partition table from /dev/sda to /dev/sdb

Watch the progress of 'dd'
Pressing ctrl-t will display the progress

Write on the console without being registered
http://www.linux-party.com/index.php/8157-escribir-en-la-consola-linux-sin-que-quede-registrado-en-el-history

Join lines
awk version of 7210. Slightly longer, but expanding it to catch blank lines is easier: $ awk 'BEGIN{RS="\0"}{gsub(/\n+/,"");print}' file.txt

IFS - use entire lines in your for cycles
When you use a "for" construct, it cycles on every word. If you want to cycle on a line-by-line basis (and, well, you can't use xargs -n1 :D), you can set the IFS variable to .

execute your commands and avoid history records
$ secret_command;export HISTCONTROL= This will make "secret_command" not appear in "history" list.

Search back through previous commands
Searches backwards through your command-history for the typed text. Repeatedly hitting Ctrl-R will search progressively further. Return invokes the command.

The proper way to read kernel messages in realtime.

show git logging
shows some logging for the git repo.


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