Commands by braak

Commands by braak (2)

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Print a list of installed Perl modules

Works only if modules are installed "the right way"
This is sample output - yours may be different.
6

perl -MExtUtils::Installed -e '$inst = ExtUtils::Installed->new(); @modules = $inst->modules(); print join("\n", @modules);'

braak · 2010-07-20 15:47:32 1
Count the number of man pages per first character (a-z)

There once was a day I needed this info. Show Sample Output
This is sample output - yours may be different.
```
302:    a
399:    b
299:    c
...
```
1

for i in {a..z} ; do man -k $i |grep -i "^$i" |wc | awk 'BEGIN { OFS = ":"; ORS = "" }{print $1, "\t"}' && echo $i ;done

braak · 2010-07-15 11:41:06 0

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scp file from hostb to hostc while logged into hosta

While at the command line of of hosta, scp a file from remote hostb to remote hostc. This saves the step of logging into hostb and then issuing the scp command to hostc.

Create a 100MB file for testing transfer speed

Start dd and show progress every X seconds

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"

Detect encoding of a text file

This command gives you the charset of a text file, which would be handy if you have no idea of the encoding.

Fetch the current human population of Earth

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"

ls -qaltr # list directory in chronological order, most recent files at end of list

I find it very handy to be able to quickly see the most recently modified/created files in a directory. Note that the "q" option will reveal any files with non-printable characters in their filename.

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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