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In Linux the chmod command is used to set file permissions.
date
in terminal it is : #cp file_a file_b
touch newfile will make a new empty file in linux os !
the command to make anything executable is chmod +x <file>
The command MV is used to move a file in simple Linux Code. This command will move files and directories from one spot to another spot. To move a file, one would simply type in the letters MV before its name.
The command is: diff file1.txt file2.txt
If you use Linux its hard to get one anywhere else... All kidding aside, the date command is used to print the current date and time (such as day of week, month, day of month, time, timezone, and year).
You can schedule jobs using cron and the /etc/crontab file, or you can use the "at" command
cat
The cp command does that.
The tail command can be used to output the last part of a text file. The default is to show the last 10 lines of a file and options are available to override this.