Pdf Bash Tools - Ghostscript - Watermarks, password protection, search, split, merge and beyond

So much pdf processing that you can do including searching, splitting, merging, pdf password protection and watermarking. Yup, for free. Check and contribute to my pdf bash tools project.

Manage HP ProCurve Switches programmatically from *nix

Just released ProCurve Commander. Repeating yourself is not fun. This is not only true when it comes to management multiple switches but also to auditing them. This same idea can be used to manage Cisco switches and in general any device accessible via SSH but not friendly to remove command invocation.

Hardening HP ProCurve HP switches

Enable SSH:

telnet 
# config
(config)# crypto key generate ssh
(config)# ip ssh
(config)# show ip ssh
(config)# exit
# exit
> exit

Confirm ssh works and disable telnet:

ssh 
# config
(config)# no telnet
(config)# exit
# exit
> exit

Change default users and set complex passwords:

password operator user-name 
password manager user-name 

Identify the switch:

# config
(config)# hostname "My ProCurve Switch  "

Java Applets in MAC OS X

Your only option is Safari, just as your only option is Internet Explorer for Windows. If the applet is insecure it won't run but you can always add exceptions at your own risk. From Apple System Preferences click on Java | Security tab | Edit Site List | Add | Apply | OK | Restart Safari.

Parsing CSV from bash

In one word csvkit. To install, use python pip and make sure you export the bin path:

pip install --user csvkit
export PATH="$HOME/.local/bin:$PATH"

To extract for instance the second column from clients.csv:

cat clients.csv | csvcut -c 2

An alternative ... csvtool.

To install it in Ubuntu:

sudo apt-get install csvtool

To install it in OS X:

brew install opam
opam init
eval `opam config env`
opam install csvtool
csvtool --help

To extract the second column (index 1) from sample.csv:

cat sample.csv | ~/.opam/system/bin/csvtool col 1 -

Find more from:

~/.opam/system/bin/csvtool --help

pm2 error: unknown option `--auto-exit'

Kubernetes cluster panic!!! App down!!! Libraries changes cause these specially when you do not make sure you use specific package versions. Our docker had just the below configuration which of course will deploy latest version of pm2:

...
RUN npm install pm2 -g
RUN pm2 update
...
CMD ["pm2-docker", "start", "--auto-exit", "process.yml"]

Not only pm2-docker was renamed to pm2-runtime (a symlink still exists) but in addition the --auto-exit flag does not exist any longer. Now you need to specify --no-auto-exit if needed.

Gmail to EML Add-On Terms of Service

I have coded GMail to EML because I wanted to avoid multiple clicks to download a gmail message. While I expect this Gmail add-on to help others I cannot make myself liable for any loses. Therefore: GMAIL TO EML ADD-ON (THE SOFTWARE) IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY.