imagemagick - add date on image

Install

sudo apt install imagemagick

example for batch mark date on images

for img in *.jpg;
do convert "$img" -gravity SouthEast -pointsize 64 -fill white -annotate +30+30 %[exif:DateTimeOriginal] "time_""$img";
done

Atom - source editor

Atom - excellent source editor under Linux, the most import thing is it's "FREE"

Install

sudo add-apt-repository ppa:webupd8team/atom sudo apt-get update sudo apt-get install atom

Ignored names (useful for search)

.git, .hg, .svn, .DS_Store, ._*, Thumbs.db, *.txt, *.tags, tags, *.stack, _out, *.htm, *.lst, .tags1

Best Packages for developers

Atom-ctags
Atom Beautify
File-icons
Highlight-line
Highlight-selected
Project-Manager
Symbol-tree-view
Terminal-plus
Vertical-tabs
Merge-conflicts
Todo-show
git-blame

SSD Optimization under Ubuntu

Reduce flush frequency

Add "noatime" on /etc/fstab UUID=f0ae2c59-83d2-42e7-81c4-2e870b6b255d / ext4 noatime,errors=remount-ro 0 1

Reserve some space for Over-provision

leave at least 7% capacity size for unformatted. (14 % is better)

Enable TRIM suuport

By default, Ubunut 16.04 will support trim operation automatically, but you could perform it manually

Reference

https://sites.google.com/site/easylinuxtipsproject/ssd

PS. Trust me, I have over 6 years experience on SSD firmware development.

Static code analysis - pylint

popular static code analysis for python language

Install (via pip)

pip install pylint

Run pylint

pylint [SOURCE]
Don't like command line tool? try pylint-gui pylint-gui

Python package installer

For all python developer, you will need it

for python 2.x

sudo apt install python-pip

for python 3.x

sudo apt install python3-pip

Static code analysis - flawfinder

Unlike cpecheck, flawfinder will looking for the security vulnerability of your source code

Install

sudo apt install flawfinder

Run flawfinder

flawfinder --html --quiet --dataonly . >> output.html

Reference

https://security.web.cern.ch/security/recommendations/en/codetools/flawfinder.shtml

Static code analysis - cppcheck

Great static code analysis tool for C/C++ programming language

Install

sudo apt install cppcheck

Run cppcheck and redirect result to output file

cppcheck --enable=all --force -j4 . 2> output

run cppcheck with html report

cppcheck --enable=all --inconclusive --xml-version=2 --force --library=windows,posix,gnu [PATH_TO_SOURCE] 2> result.xml && cppcheck-htmlreport --title="Your Project Name" --source-dir=[PATH_TO_SOURCE] --report-dir=[OUTPUT_DIR] --file=result.xml && rm result.xml Would like to try latest version of cppcheck? just clone the source from github https://github.com/danmar/cppcheck.git for more detailed information, please visit the home page https://github.com/danmar/cppcheck

Reference

https://sites.google.com/site/opensourceconstriubtions/ettl-martin-1/tutorials/how-to-generate-an-html-report-with-doxygen-using-the-linux-command-line-interface

Run 32 Bits program on Ubuntu 64 Bits

Sometimes, you might need to run 32 bits program under 64 bits environment. Here are the packages you need sudo apt install primus-libs-ia32 sudo apt install gcc-multilib sudo apt install lsb

hdparm - Sorage Device Configuration Tool

Official Website: hdparm

hdparm is a powerful and open source storage device configuration tool under Unix/Linux system. Here are the parameters I frequently used.

• Identify Devicehdparm -I /dev/sdb
• SecureErase hdparm --user-master u --security-set-pass p /dev/sdb
  hdparm --user-master u --security-erase p /dev/sdb
  hdparm --user-master u --security-unlock p /dev/sdb
  hdparm --user-master u --security-disable p /dev/sdb
• Set Maximum Sector (84GB / 128GB)hdparm -N p164115504 --yes-i-know-what-i-am-doing /dev/sdb

To pursue higher performance, storage device might implement data caching (store in the internal DRAM). However, it might have the risk of data loss, especially when a power failure occurred. For data protection purpose, we could disable write cache to prevent data loss disaster. Here are the steps for disabling write cache.
Disable Write Cache(Assume your device mounted on /dev/sdb) hdparm -W 0 /dev/sdb Enable Write Cache hdparm -W 1 /dev/sdb Once you disable the write cache, the performance will drop sharply!!!

Linux S3/S4 testing tool - rtcwake

Source: lpmt.c

If you are looking for a S3/S4 testing program under Linux OS. Here is a simple example to demonstrate how to do it by rtc

Compile:
gcc -o lpmt lpmt.c

Run:  (S3 for 100 cycles)
sudo ./lpmt S3 100
use it at your own risk :)

Ubuntu menu editor - alacarte

very useful tool sudo apt install alacarte

Equation Editor: LaTeX - Equalx

Install qeualx sudo apt install equalx List of LaTeX mathematical symbols