ulimit -Sv 1000 # 1000 KBs = 1 MB ulimit -Sv unlimited # Remove limit
tar tf file.tgz tar xf file.tgz filename
find . -size 20c # By file size (20 bytes)
find . -name "*.gz" -delete # Delete files
find . -exec echo {} \; # One file by line
./file1
./file2
./file3
find . -exec echo {} \+ # All in the same line
./file1 ./file2 ./file3
yes yes hello
while inotifywait -e close_write document.tex do make done
cat file.txt | sort -R cat file.txt | sort -R | head # Pick a random sambple # Even better (suggested by xearl in Hacker news): shuf file.txt
./script.sh <Type any input you want> <Ctrl-Z> # send process to sleep jobs -l # find out the job id disown -h jobid # disown job bg # continue running in the background
timeout 10s ./script.sh # Restart every 30 minutes while true; do timeout 30m ./script.sh; done
sudo swapoff -a sudo swapon -a
sudo fsck.ext4 -f -y /dev/sda1 sudo fsck.ext4 -v /dev/sda1 sudo mke2fs -n /dev/sda1 sudo e2fsck -n <first block number of previous list> /dev/sda1
pdftk *.pdf cat output all.pdf # Join PDFs together pdftk A=in.pdf cat A5 output out.pdf # Extract page from PDF
cpdf -draft in.pdf -o out.pdf # Remove images cpdf -blacktext in.pdf -o out.pdf # Convert all text to black color
# Write random data, encode it in base64 and monitor how fast it # is being sent to /dev/null cat /dev/urandom | base64 | pv -lbri2 > /dev/null # pv options: # -l, lines # -b, total counter # -r, show rate
apt-file update apt-file search dir/file.h
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