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Using a GUI file managers you can merge directories (cut and paste). This command roughly does the same (it doesn't ask for confirmation (no problem for me) and it doesn't clean up the empty SRC directories (no problem, trivial). probably does the same:
cp -l SRC TARGET; rm -rf SRC0(cd SRC; find . -type d -exec mkdir TARGET/{} ";"; find . -type f -exec mv {} TARGET/{} ";") -
0i=60;while [ $i -gt 0 ];do if [ $i -gt 9 ];then printf "\b\b$i";else printf "\b\b $i";fi;sleep 1;i=`expr $i - 1`;done
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cat without comments
0cat /etc/squid/squid.conf | grep -v '^#' | sed '/^$/d' -
0git diff | git apply --reverse
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Change your Desktop background/wallpaper with feh lightweight command. fill background directory with appropriate content.
0feh --bg-scale "`ls -d $HOME/backgrounds/* |sort -R |tail -1`" -
Well, this is quite useful for testing if your hardware watchdog is working properly.
0echo c > /proc/sysrq-trigger -
Output should be two JPG files named like "output-1.jpg" and "output-2.jpg". The convert command is part of ImageMagick so you'll need that and dependent packages installed to use it.
0convert yourdoublewideimage.jpg -crop 50%x100% +repage output.jpg -
This is especially useful for adding changes to a temporary repo, such as a Gist. Avoid using this when collaborating with others.
0git commit --allow-empty-message --message "" -
I'm the author of PM2 and wrote this tool, and I'm please to share it here. Github project link: https://github.com/Unitech/pm2 Show Sample Output
0pm2 start app.js -
Change bitrate with option '-b'
0ssh user@host ffmpeg -b 200 -an -f video4linux2 \ -s 960x720 -r 10 -i /dev/video0 -b 200 -f ogg - \ | mplayer - -idle -demuxer ogg -
Order and uniq
0declare -a array=($(tail -n +2 /proc/net/tcp | cut -d":" -f"3"|cut -d" " -f"1")) && for port in ${array[@]}; do echo $((0x$port)); done | sort | uniq -
0ffmpeg -f image2 -r 15 -i pic.%04d.png -r 15 -b:v 8M vid15.avi
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The example uses hashicorps packer as the sample file, but any .zip file which only contains a single file will work. Show Sample Output
0curl -Ss https://releases.hashicorp.com/packer/1.0.0/packer_1.0.0_linux_amd64.zip | zcat > packer -
Python is installed on many boxes (in case you could not afford installing jq).
0curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | python <(echo "import json,sys;v=json.load(sys.stdin);for i in v:; print(i['git_url']);" | tr ';' '\n') -
0(acroread &);sleep 2;gdb /opt/Adobe/Reader8/Reader/intellinux/bin/acroread `pidof ld-linux.so.2`
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Handy use of bc in the command line. No need to get 'into' the bc to perform calculations Show Sample Output
0echo 2+3 |bc -
List packages and their disk usage in decreasing order. This uses the "Installed-Size" from the package metadata. It may differ from the actual used space, because e.g. data files (think of databases) or log files may take additional space. Show Sample Output
0perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size: (.*)/;' < /var/lib/dpkg/status | sort -rn | less -
0type <command>
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0find . -name "*.php" -exec grep -i -H "search pharse" {} \;
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0awk '{if ($1~/Sun|Mon|Tue|Wed|Thu|Fri|Sat/) {DATE=$2" "$3" "$4" "$5 } else {print DATE"|"$0}}' alterorcl.log
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0sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep udp && echo && sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep tcp
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Just an other solution :)
0echo foobar | sed -r 's/(^.|.$)//g' -
0(sed 's/^/x*=/' file ; echo x) | bc
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0DATE=`date +"%H:%M" --date '-1 min'`; egrep "\ $DATE\:..\ " /var/log/dhcpd.log |awk '/DHCPREQUEST/ {split($3,t,":"); printf("%02d:%02d\n",t[1],t[2]);}' |uniq -c;
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0hexdump -C file
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