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Linux Basics

Rudrakshi on January 12, 2021

Linux is a family of open-source Unix-like operating systems based on the Linux kernel developed by Linus Torvalds. It’s essential for a software d...

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Chittoji Murali Sree Krishna • Jan 12 '21 • Edited

Nice, but misses out few

Like:

mkdir directoryname
# Make directory
touch filename
# Make files
cd dirname
# Changing the directory
cd ..
# Going back to previous directory
cd
# Going to home Directory
mv filename /Directory/filename 
# It will move the file from somewhere to other
cp filename /directory/filename 
# It will copy the file from on to other
less filename
# This will print contents inside the file but only one page per time
ls -a && ls -al
# Prints all the files or folders inside directory even the hidden ones, same prints permissions for all even for hidden
man command
# To see manual-pages of the command or another way for command --help
locate filename 
# To locate the file 
df
# Used to see disk space to see space in megabytes df -m
uname -a
# See the distro details
hostname
# To see the name of the host or wifi
hostname -i
# To see ip address
chmod
# chmod +x filename to make file executable or chmod 777 filename to give file root permission

There might be more but these were upto my knowledge

Shrihan • Jan 14 '21

touch command is the most basic one which many people misunderstand. The touch command is used to modify timestamps on a file, but it actually gives the effect of creating a new file.

Chittoji Murali Sree Krishna • Jan 14 '21

touch filename - will create an empty file
touch -a filename - change the access time only
touch -c filename - if the file does not exist, do not create it
touch -d filename - update the access and modification times
touch -m filename - change the modification time only
touch -r - use the access and modification timestamp of file
touch -t - creates a file using a specified time

it creates a file and also can modify the timestamps

Shrihan • Jan 14 '21

Exactly!

Chittoji Murali Sree Krishna • Jan 14 '21

most of the people will not use these options & they won't bother about timestamps, so I haven't mentioned them previously.

Rudrakshi • Jan 13 '21

Thanks for sharing this!

OjusWiZard • Jan 12 '21

Very Informative!
A great one to get some high-level understanding.

Rudrakshi • Jan 12 '21

Thank you, Ojus :)
Am glad you liked it.

Sourabh S Nath • Jan 13 '21

Beyond software development, I ask everyone to try and use a Linux distro as their primary desktop os. Benefits range from simple performance improvements to much better respect for your privacy in comparison to windows.

Rudrakshi • Jan 13 '21

Yes, exactly!

E.R. Nurwijayadi • Jan 12 '21

Go details with linux diversity:

🕷 epsi-rns.github.io/system/2020/10/...

Rudrakshi • Jan 13 '21

Thanks for sharing this!

chanduthedev • Mar 2 '21

Permission values are 1,2 and 4 as shown below and why not 3 after 1 and 2?
4 → read permission
2 → write permission
1 → execute permission
This is basing on the power of two, starting from zero.

2*0 = 1 → execute permission
21 = 2 → write permission
2*2 = 4 → read permission
Due to this logic, there is 4 and not 3.

This will help to remember permission values easily.