SSH free password login

step1 :  Create public and private keys using ssh-key-gen on local-host

$ssh-keygen

step 2: Copy the public key to remote-host using ssh-copy-id

$ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host

step 3: login remote host and change file permission

Change the permissions of .ssh to 700

$chmod 700 .ssh

Change the permissions of .ssh/authorized_keys to 640

$chmod 640 .ssh/authorized_keys

step 4: login from local host

ssh remote-host

(Optional) Alias for remote-host name

In local host

$vi .ssh/config

and add following lines

    Host short-name

    Hostname remote-host-name

    User your_user_name

    Port your_remote_host _port

Grammar check for .tex file

TeXtidote is a tool for spell and grammar check for Latex source file.

Installation:

download the deb file from https://github.com/sylvainhalle/textidote/releases.

$ sudo apt-get install ./textidote_X.Y.Z_all.deb

X.Y.Z. is the version number.

Java is needed and can be installed via,

$ sudo apt install default-jdk

useage:

textidote --check en  --output html paper.tex  >report.html

Open source grammar check tool

pyLanguagetool

pip install pylanguagetool

# pipe text to pylanguagetool

echo "This is a example" | pylanguagetool

# read text from a file

pylanguagetool textfile.txt

# read text from stdin

pylanguagetool < textfile.txt

# read text from the systems clipboard

pylanguagetool -c # get text from system clipboard

Reference:

https://github.com/Findus23/pyLanguagetool

Check the duplicate by Google search

#!/usr/bin/env python3
# stollen plagiarism checker
# by Seth Kenlon 
# GPLv3

# This program is free software: you can redistribute it
# and/or modify it under the terms of the GNU General
# Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at
# your option) any later version.

# This program is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.

# You should have received a copy of the GNU General
# Public License along with this program.
# If not, see .

# useage:
# python3 -m pip install google --user
# $ chmod +x ./stollen.py
# $ ./stollen.py test.txt


import sys
import random
from pathlib import Path
from googlesearch import search

def Scrub(ARG):
    """
    Read lines of file.
    """

    f = open(ARG, 'r')
    LINES = f.readlines()
    Search(LINES)

def Search(LINES):
    """
    Search Internet for exact match of LINE.
    """

    COUNT=0
   
    for LINE in LINES:
        COUNT += 1        
        PAUSE = random.randrange(1,4)

        if VERBOSE:
            print("Searching...")
           
        for ITEM in search(LINE, tld="com", num=1, stop=1, pause=PAUSE):
            if VERBOSE:
                print("WARNING:" + LINE + " → " + ITEM)
            else:
                print("WARNING: line " + str(COUNT) + " → " + ITEM)

if __name__ == "__main__":
    random.seed()
    n=1
   
    if sys.argv[1] == "--verbose" or sys.argv[1] == "-v":
        VERBOSE = True
        # shift 1
        n += 1
    else:
        VERBOSE = False
       
    f = Path(sys.argv[n])

    if not f.is_file():
        print("Provide a text file to check.")
        exit()
    else:
        Scrub(sys.argv[n])

Reference: https://opensource.com/article/20/3/open-source-writing-tools

Please update your system to include revtex4-1.cls

You need to install revtex4-1 package.

download revtex4-1 package

http://d22izw7byeupn1.cloudfront.net/files/revtex/index.html (version 4-1)

or https://ctan.org/pkg/revtex4-1

(https://journals.aps.org/revtex  (can only find 4-2 version) )

$unzip revtex4-1.zip

then enter revtex4-1 folder,

$unzip revtex4-1-tds.zip

move the revtex4-1-tds to appropriate position

$cp revtex4-1-tds     /usr/share/texmf/tex/latex

or 

$cp revtex4-1-tds     /usr/share/texlive/texmf-local

or 

$kpsewhich -var-value TEXMFLOCAL  # to find out the right place

finally,

$sudo texhash

Reference:

https://ubuntuforums.org/showthread.php?t=995840&page=2

Learning Turbulence

 https://my.eng.utah.edu/~mcmurtry/Turbulence/turbulence.html