Commands by raspi (3)

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Send your terminfo to another machine
I frequently use this trick to send my terminal settings to HPUX and older RHEL systems. This is due to the fact that terminfo support for rxvt-unicode (my preferred terminal app) does not exist on many older Linux and Unices.

prints the parameter you used on the previous command

Output as many input
Output of a command as input to many

Exclude inserting a table from a sql import
Starting with a large MySQL dump file (*.sql) remove any lines that have inserts for the specified table. Sometimes one or two tables are very large and uneeded, eg. log tables. To exclude multiple tables you can get fancy with sed, or just run the command again on subsequently generated files.

journalctl -f
a tail -f variant of systemd journal. Follow the most recent updates or if events are appended to the journal

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"

List files opened by a PID
Lis all files opened by a particular process id. "PID"

cat stdout of multiple commands

Start a command on only one CPU core
This is useful if you have a program which doesn't work well with multicore CPUs. With taskset you can set its CPU affinity to run on only one core.

list block devices
Shows all block devices in a tree with descruptions of what they are.


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