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

determine if tcp port is open

backup with mysqldump a really big mysql database to a remote machine over ssh
backup big mysql db to remote machine over ssh. "--skip-opt" option is needed when you can?t allocate full database in ram.

Processes by CPU usage

Watch RX/TX rate of an interface in kb/s
A shorter version

How to estimate the storage size of all files not named *.[extension] on the current directory
With this sentence we can estimate the storage size of all files not named *.jpg on the current directory. The syntax is based on Linux, for Unix compliance use: find ./* -prune ! -name '*.jpg' -ls |awk '{TOTAL+=$7} END {print int(TOTAL/(1024^2))"MB"}' We can change the jpg extension for whatever extension what we need

Execute a sudo command remotely, without displaying the password
The ssh command alone will execute the sudo command remotely, but the password will be visible in the terminal as you type it. The two stty commands disable the terminal from echoing the password back to you, which makes the remote sudo act as it does locally.

simplest calculator

get you public ip address
Relies on ifconfig.me functioning. It's about as easy as it gets, and memorable to old geeks too.

Find all dotfiles and dirs
find makes it easier, filtering . and .. maxdepth could be removed, finding entries recursively. Removing mindepth causes . to appear


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