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Remove \r (carriage return) in a file

Recursively remove all files in a CVS directory
This will search all directories and ignore the CVS ones. Then it will search all files in the resulting directories and act on them.

Using PIPEs, Execute a command, convert output to .png file, upload file to imgur.com, then returning the address of the .png.
imgur < /etc/issue % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 2360 0 635 100 1725 1027 2792 --:--:-- --:--:-- --:--:-- 4058 http://i.imgur.com/bvbUD.png

zsh only: access a file when you don't know the path, if it is in PATH
Say you want to execute 'file' on the command 'top' (to determine what type of file it is); but you don't know where 'top' resides: preface the argument with = and zsh will implicitly prepend the path.

Rescan partitions on a SCSI device
Used this after cloning a disk with dd to make the newly written partitions show up in /dev/

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

convert wav files to ogg
cd to the folder containing the wav files and convert them all to ogg format. in my sample output i use the -a and -l flags to set the author and album title. to get the oggenc program in ubuntu linux run: sudo apt-get install oggenc

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"


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