To do copy paste on vim, we can use visual mode by typing v when on normal mode. Use cursor to select the text to copy. Below we select 6 characters. After selecting the text then press y to copy the text to register.
Continue reading “Vim : Copy Paste Operation”Optimize linux battery life
Ubuntu/Debian : sudo apt install tlp
to start it : sudo tlp start
to show stat : sudo tlp stat
Long time no see wordpress ! been busy lately.
unar : Extract multipart zip files on linux
Its a shock knowing that the unzip program available on linux cant easily extract multipart zip files with ease. There is alternative program unar also available to do this task efficiently.
If u have multipart zip files as follow archive.zip.001, archive.zip.002archive.zip.003 then just execute unar archive.zip.001 and extraction will begin.
To install unar on debian/ubuntu based linux : sudo apt install unar.
Soon enough goodbye november and welcome december, go away pandemic.
Python package manager
Ruby have its gem command to install package and python have pip. Since python 3.4, pip is included to default install.
On my linux mint pip command is pip3 and i try to list installed package with pip list command.
To install a package try : pip install <package name>
To search a package try : pip search <searched word>
Trying postgresql c++ interface : pqxx
Postgresql database have an official interface to C programming language and a C++ interface derived from that. C++ is a different language from C and i think it will be more easier to deal with.
Lets give a try on the newest linux mint 20.
1. install libpqxx-dev package (sudo apt-get install libpqxx-dev).
2. install codelite IDE (sudo apt-get install codelite).
3. install postgresql (sudo apt-get install postgresql).
4. create an user (user1) for connecting to postgresql. Continue reading “Trying postgresql c++ interface : pqxx”
Java Scripting on JDK 11
JDK 11 make java command can directly run source code like other scripting language or interpreter. Lets say we have a java source file called hello.java as follow.
public class Hello {
public static void main(String[] args) {
System.out.println(“Hello World!”);
}
}
Run the file by executing :
java hello.java
It works!
End.
Minimum Profit : A Programmer Text Editor
Minimum Profit is a text editor for programmer available to download from https://triptico.com/software/mp.html. I accidentally found this software from article related to OpenBSD and the author is the creator of this mp editor. The downloads are available in source and windows executable (Wow).
I managed to compile mp 5.38 on debian 10 using ncursesw driver which is already available on my laptop. Compilation step as follow.
Continue reading “Minimum Profit : A Programmer Text Editor”
Playing with Emacs – Open file, edit, save file.
Emacs is an editor, but not just it. Thats what i read on internet. Emacs like in a battle with Vim, another editor. I have play with vi so many years ago, but with emacs it is just recently i learned to use it basic function.
Install it on ubuntu we can choose GUI or terminal version. I like the terminal version because it will be handy during my engagement with VM/Cloud which only can use terminal to manage it.
Open Emacs by typing on terminal emacs and press enter, it will show a welcome page like below.
We can move cursor to a hyperlink and press enter to go to particular subject, like tutorial or manual. Tutorial can also accessed using key combination C-h t, which mean press Ctrl and hold then press h, release keys, then press t. C is Ctrl and M is Meta (Alt/Esc).
Continue reading “Playing with Emacs – Open file, edit, save file.”
“gem install pg sqlite3” required packages on ubuntu 18.04 LTS
apt-get install postgresql-client sqlite3
apt-get install libpq-dev libpqtypes-dev libsqlite3-dev
gem install pg sqlite3
Create text file with ed
Unix alike system have ed for editing text file which is i feel strange at first. I learned some time ago to create small text file out of curiosity.
Lets try by creating a text file containing 3 lines.
- type ed on terminal
- type a then enter (a is append command in ed)
- type your text file content.
- To end input mode type . then enter on a line.
- Type w filename.txt then enter to save to a file.
- Type q to quit from ed.
Here we will show in a terminal.