Embedded Files
pwd
pwd
It stands for Print Working Directory. It shows you which directory you are currently working in.
cd
cd
It stands for change directory. You can change your working directory using cd.
ls
ls
Use the "Is" command to know what files are in the directory you are in.
You can see all the hidden files by using the command “ls -a”.
To see the permissions of the files in the directory we type “ls -l”
touch
touch
The touch command is used to create a blank file.
mkdir
mkdir
We use this command to create a directory.
rm
rm
We use this command to delete a file. If we want to delete a directory, we use “rm -r dir_name”
cat
cat
cat is a standard Unix utility that reads files sequentially, writing them to standard output.
The name is derived from its function to concatenate files.
cp
cp
We use this command to copy a file.
mv
mv
mv (short for move) is a Unix command that moves one or more files or directories from one place to another. If both filenames are on the same filesystem, this results in a simple file rename; otherwise the file content is copied to the new location and the old file is removed.
top
top
The top command allows users to monitor processes and system resource usage on Linux. It is one of the most useful tools in a sysadmin’s toolbox, and it comes pre-installed on every distribution.
Press Ctrl+C to exit.
chmod
chmod
The chmod command changes the access permissions of files and folders.
You can manipulate permissions for user, group and others.
nano filename.extension
nano filename.extension
The nano command opens up a terminal text editor. To exit we use ctrl+x
|
|
The | (pipe) command pipes the output of the previous command to the next command.
Every single program in the UNIX/Linux system has 3 built-in data streams.
STDIN (0) – Standard input
STDOUT (1) – Standard output
STDERR (2) – Standard error
grep
grep
grep prints lines that contain a match for one or more patterns.
Given one or more patterns, grep searches input files for matches to the patterns.
When it finds a match in a line, it copies the line to standard output (by default), or produces whatever other sort of output you have requested with options.
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