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Find large file (higher than 100 mb)

find . -type f -size +100M

./13/data/log/postgresql-Tue.log

Then check it's size:

  ls -lh ./13/data/log/postgresql-Tue.log

-rw------- 1 postgres postgres 1.3G Jan 31 19:10 ./13/data/log/postgresql-Tue.log