15 Linux commands every programmer should know
A thread🧵
A thread🧵
🔸pwd -
To print the present working directory
The command will return an absolute (full) path, which is basically a path of all the directories that starts with a forward slash (/).
An example of an absolute path is /home/username
To print the present working directory
The command will return an absolute (full) path, which is basically a path of all the directories that starts with a forward slash (/).
An example of an absolute path is /home/username
🔸cd -
To change to a different directory
Example: cd workspace
There are some shortcuts to help you navigate quickly:
-> cd .. to move one directory up
-> cd to go straight to the home folder
-> cd- to move to your previous directory
To change to a different directory
Example: cd workspace
There are some shortcuts to help you navigate quickly:
-> cd .. to move one directory up
-> cd to go straight to the home folder
-> cd- to move to your previous directory
🔸ls -
To list the contents of a directory
Variations with the ls command:
-> ls -R will list all the files in the sub-directories too
-> ls -a will show the hidden files
-> ls -al will list the files and directories with detailed information like the permissions,size,owner,etc
To list the contents of a directory
Variations with the ls command:
-> ls -R will list all the files in the sub-directories too
-> ls -a will show the hidden files
-> ls -al will list the files and directories with detailed information like the permissions,size,owner,etc
🔸mkdir -
To make a new directory
Example: mkdir abc
-> To generate a new directory inside another directory, use this command mkdir abc/def
To make a new directory
Example: mkdir abc
-> To generate a new directory inside another directory, use this command mkdir abc/def
🔸rmdir -
To remove an empty directory
Example: rmdir abc
Note if the directory contains files or subdirectories, it does not remove the directory.
To remove an empty directory
Example: rmdir abc
Note if the directory contains files or subdirectories, it does not remove the directory.
🔸touch -
To add files
Example: touch abc/pqr.txt
This creates a new txt file named pqr inside abc
To add files
Example: touch abc/pqr.txt
This creates a new txt file named pqr inside abc
🔸cat -
To print out contents of a file
Example: cat abc/pqr.txt
Other ways to use the cat command:
-> cat > filename creates a new file
-> cat filename1 filename2>filename3 joins two files (1 and 2) and stores the output of them in a new file (3)
To print out contents of a file
Example: cat abc/pqr.txt
Other ways to use the cat command:
-> cat > filename creates a new file
-> cat filename1 filename2>filename3 joins two files (1 and 2) and stores the output of them in a new file (3)
🔸tree -
To print out the layout of files and directories under it in a tree fashion
To print out the layout of files and directories under it in a tree fashion
🔸cp -
To copy the file from the current directory to a different directory
Example: cp pqr.txt /home/username/MyFiles
It would create a copy of pqr.txt from your current directory into the MyFiles directory
To copy the file from the current directory to a different directory
Example: cp pqr.txt /home/username/MyFiles
It would create a copy of pqr.txt from your current directory into the MyFiles directory
🔸rm -
To remove a file
Example: rm abc/pqr.txt
It would remove the pqr.txt file
To remove a file
Example: rm abc/pqr.txt
It would remove the pqr.txt file
🔸mv -
To move files, can also be used to rename files. Arguments are similar as in the cp command
To rename files, the Linux command is:
mv oldname.ext newname.ext
To move files, can also be used to rename files. Arguments are similar as in the cp command
To rename files, the Linux command is:
mv oldname.ext newname.ext
🔸echo -
To move some data into a file
Example: echo Hello world >> pqr.txt
It will add the text "Hello world" into the file pqr.txt
To move some data into a file
Example: echo Hello world >> pqr.txt
It will add the text "Hello world" into the file pqr.txt
🔸ping -
To check connectivity status to a server
Example: ping google.com
It will check whether you’re able to connect to Google and also measure the response time
To check connectivity status to a server
Example: ping google.com
It will check whether you’re able to connect to Google and also measure the response time
🔸grep -
It lets you filter/search through all the text in a given file
Its usage is: grep <pattern> <file>
It lets you filter/search through all the text in a given file
Its usage is: grep <pattern> <file>
🔸head -
To view some lines of a file from start
Its different usages are :
-> head filename: To view first 10 lines of the file
-> head -n number filename: Number of lines required
-> head -c bytes filename: Number of bytes required
Similar is the tail command to view from end
To view some lines of a file from start
Its different usages are :
-> head filename: To view first 10 lines of the file
-> head -n number filename: Number of lines required
-> head -c bytes filename: Number of bytes required
Similar is the tail command to view from end
If you liked this, make sure to:
1. Follow me @meetjain74
2. Retweet the first tweet
3. Turn on the notifications to never miss these amazing tweets.
Thanks so much for getting to the end of the thread! Let me know your thoughts below
1. Follow me @meetjain74
2. Retweet the first tweet
3. Turn on the notifications to never miss these amazing tweets.
Thanks so much for getting to the end of the thread! Let me know your thoughts below
• • •
Missing some Tweet in this thread? You can try to
force a refresh
