gdm

# rename files with complex names
j=1
for f in *.jpg ; do
  echo "mv '$f' p${j}.jpg"
  j=$((j+1))
done

gdm

hhvm.conf:

check program check-hhvm with path "/etc/monit/bin/check-hhvm.sh"
  if status != 0 then alert
  if status != 0
  then exec "/usr/sbin/service hhvm restart"
  
/etc/monit/bin/check-hhvm.sh:
#!/bin/bash

gdm

#!/bin/bash -xe

VGNAME=eph

# now we need to check that we use ephemeral disk as /dev/xvdb
# its very naive check but better then nothing because operations above can be dangerous
if ! lsblk | grep '^xvdb' | grep 75G > /dev/null ; then
  echo "Problems with expectations for /dev/xvdb"
  exit 1
fi

gdm

nvm install 11.9.0 --reinstall-packages-from=11.8.0
nvm ls-remote
du -sh ~/.nvm/versions/node/*

gdm

for i in {1..83} ; do echo $i ; pdftoppm file.pdf page-$i -png -f $i -singlefile ; done; 

gdm

[root@bigben audit]# iptables --line-numbers -n -L -t nat
Chain PREROUTING (policy ACCEPT)
num  target     prot opt source               destination         
1    DOCKER     all  --  0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT)
num  target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
num  target     prot opt source               destination         

gdm

# usefull when parse output frow aws cli

# from https://github.com/stedolan/jq/issues/370
jq '.Attributes[] | select (.Name == "public_ip") | .Value'

# json to bash-style env
jq  -r  'to_entries | .[] | .key + "=\"" + .value + "\""' | grep -P '^AWS_(REGION|ACCESS_KEY|SECRET|SESSION)'

# parse CloudTail logs (from http://flaws2.cloud/defender3.htm )
jq -cr '.Records[]|[.eventTime, .sourceIPAddress, .userIdentity.arn, .userIdentity.accountId, .userIdentity.type, .eventName]|@tsv' | sort

gdm

List deptree
for i in `rpm -qa` ; do echo "Package [$i]:"; rpm -q --requires $i ; echo ; done

gdm

udevadm info -n /dev/sdb -q property
udevadm monitor

Pre-installed udev rules
/lib/udev/rules.d/60-block.rules

ACTION=="add", SUBSYSTEM=="block", ENV{ID_FS_UUID}=="xxxxx", RUN+="/root/my-usb.sh $devpath $name"

gdm

for FILE in *.mp4; do
    echo -e "Processing video '\e[32m$FILE\e[0m'";
    ffmpeg -i "${FILE}" -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 "${FILE%.mp4}.mp3"
done;

# find . -type f -iname "*.webm" -exec bash -c 'FILE="$1"; ffmpeg -i "${FILE}" -vn -ab 128k -ar 44100 -y "${FILE%.webm}.mp3";' _ '{}' \;
#ffmpeg -i video.mp4 -vn \
#       -acodec libmp3lame -ac 2 -ab 160k -ar 48000 \
#        audio.mp3