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February 4, 2020

Replace spaces with comma

Here’s a simple sed command to replace multiple spaces into a comma delimited file.

sample.txt

one       two
three     four

one two three four

The sed command.

sed 's/ \+ /,/g' sample.txt > sample2.txt

sed 's/ \+ /,/g' sample.txt > sample2.txt

sample2.txt

one,two
three,four

one,two three,four

May 14, 2019

Count Number of Files in Directory

Get a count of the number of files in a directory.

# using ls
ls | wc -l
ls -Aq | wc -l
# include hidden files 
find . ! -name . -prune -print | grep -c /
find .//. ! -name . -print | grep -c //
# using tree if installed. yum install tree. apt-get install tree
tree

# using ls ls | wc -l ls -Aq | wc -l # include hidden files find . ! -name . -prune -print | grep -c / find .//. ! -name . -print | grep -c // # using tree if installed. yum install tree. apt-get install tree tree

April 1, 2019

Find the Biggest File

Find the biggest files in the current directory. Sort by from large to small. Display only the top 20. Display in human readable format.

find -type f -exec du -Sh {} + | sort -rh | head -n 20

find -type f -exec du -Sh {} + | sort -rh | head -n 20

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