linux commands

gistfile1.sh

# top 30 largest files
du -sb * | sort -nr | head -30

# directory count
ls -l | grep ^d | wc -l

# directory count (recursively)
ls -lR | grep ^d | wc -l

# directory size
du -ch | grep total

# empty trash
rm -rf ~/.local/share/Trash/*

# check free disk space
df -h

# Search the specific word in directory and show filenames
grep -H -R 'eval(' . | cut -d: -f1

# Find suspicious PHP files
find . -type f -name "*.php" -exec grep --with-filename "eval(\|exec(\|base64_decode(" {} \;
./virus.php: eval(base64_decode($_GET['a']));

# Find files
find . -print | grep -i '*.php'

# Search for a files which contains a word in directory
grep -r word *