Commands by nguoilaodong1 (0)

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Top 10 Memory Processes
It displays the top 10 processes sorted by memory usage

port forwarding
pem file used by AWS servers for additional security

Rename files in batch

show the date every rpm was installed
the newest rpms are at the top; individual packages can also be queried this way: rpm --last -q package

Install pip with Proxy
Installs pip packages defining a proxy

Quick key/value display within /proc or /sys
Within /proc and /sys there are a lot of subdirectories, which carry pseudofiles with only one value as content. Instead of cat-ing all single files (which takes quite a time) or do a "cat *" (which makes it hard to find the filename/content relation), just grep recursively for . or use "grep . /blabla/*" (star instead of -r flag). For better readability you might also want to pipe the output to "column -t -s : ".

Top 10 Memory Processes
It displays the top 10 processes sorted by memory usage

Recursively remove directory with many files quickly
rsync'ing an empty directory over a directory to be deleted recursively is much faster than using rm -rf, for various reasons. Relevant only for directories with really a lot of files.

remove hostname from known_hosts

Show recent earthquakes in Bay Area
To see only earthquakes for today, add another pipe to egrep "`date '+%Y/%m/%d'`"

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