1 touch
A very common method for touch instruction
1.1 Create a file
touch
1.2 Create two files at the same time
touch
1.3 Bulk creation of files (such as creating 2000 files)
touch test{0001…2000}.txt
1.4 Change the file Time to the current time (already exists)
touch
2 vi and vim
vi
vim
Vi and Vim are still very powerful.
3 Use >, >>
3.1 >
Directly overwrite the original file, there will be no prompts
3.2 >>
Append to the end of the original file and will not overwrite the content of the original file.
3.3 Use directly > Create empty files
> test.ini
3.4 ls Create a file (write the result to the file)
ls > test.ini
ls >> test.ini
3.5 grep creates a file (writes the result to the file)
ps -ef | grep java >test.ini
ps -ef | grep java >>test.ini
3.6 echo creates a file (writes the result to the file)
echo $PATH >
echo $PATH >>
4 Create a file using CP
As long as the target file is a new file, it is considered to be a creation file. You can read this blog post for detailed CP command interpretation: /poloyy/p/
5 Create a file using cat
5.1 Simple use>,>>
cat > test.ini
cat >> test.ini
In fact, it is also useful > and >> , but one thing is different that after typing the above command, you will enter the editing mode. You can directly enter the content you want to write, and finally press ctrl+z to exit the editing mode to save automatically.
5.2 cat combined with eof
cat >> test.ini <<eof
2
2
2
eof
eof can be used as a delimiter. When encountering the next delimiter, the input will be stopped; the upper and lower case will be the same
5.3 cat combined with exit
Same as eof
cat>> test.ini <<exit
1
1
exit
Reprinted from: /zicmic/p/