Commands by mvrilo (4)

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Insert the last argument of the previous command
for example if you did a: $ ls -la /bin/ls then $ ls !$ is equivalent to doing a $ ls /bin/ls

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

list files recursively by size

Show log message including which files changed for a given commit in git.

Display a block of text with AWK
I find this terribly useful for grepping through a file, looking for just a block of text. There's "grep -A # pattern file.txt" to see a specific number of lines following your pattern, but what if you want to see the whole block? Say, the output of "dmidecode" (as root): $ dmidecode | awk '/Battery/,/^$/' Will show me everything following the battery block up to the next block of text. Again, I find this extremely useful when I want to see whole blocks of text based on a pattern, and I don't care to see the rest of the data in output. This could be used against the '/etc/securetty/user' file on Unix to find the block of a specific user. It could be used against VirtualHosts or Directories on Apache to find specific definitions. The scenarios go on for any text formatted in a block fashion. Very handy.

FizzBuzz one-liner in Python
A common programming question for interviewers to ask potential job candidates is to code "FizzBuzz". That is, if a number is divisible by 3, then it should display "Fizz". If a number is divisible by 5, it should display "Buzz". If it is divisible by both, then it should display "FizzBuzz". Otherwise, display the current number between 1 and 100.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Replace space in filename
This commands removes space from all the files with specific extension. I've specifed *.jpg as an example.

Synchronize date and time with a server over ssh
Set Remote Server Date using Local Server Time (push)

Analyze, check, auto-repair and optimize Mysql Database
A useful way to do a full check and auto repair damaged databases


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