reating the link files
ln -s /home/vagrant/data/tool.txt devtool It will create the softlink of the original file
unlink devtool It unlinks the file
rm devtool It is also unlink the file
Filter by grep command
(grep word file)
grep what file name It means the what is the word contains the file it will searches
grep -i what file name It searches the word by case insensitively
grep -i what *.cfg It searches all files contains .cfg
grep -i what * It searches the all the files in current directory
less and more
less file name It shows the information by pressing the down arrow to go down up to go upwords and type q to quit
more file name It shows the information by pressing enter to go down and press q to quit
head and tail
head file name It shows 10 lines from starting
head -20 file name It shows 20 lines from starting
tail file name It shows 10 lines from ending
tail -20 file name It shows 20 lines from ending
tail -f file name It shows the dynamic content it updates in terminal
cut -d: -f1 file name Delimiters is used to shows the colums by separately
Search and replace by Vim editer
:%s/devops/noops/g It replaces the word devops by noops in vim editer
sed -i 's/devops/noops/g' It replaces the word devops by noops
head -5 file name > /tmp/tool.txt It store the first five lines into tool.txt file
head -5 file name >> /tmp/tool.txt It store the first five lines into tool.txt and keeps the previous info
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