mdpuma

#!/bin/bash

# show inodes by current dir
for i in `ls`; do echo -n "$i: "; find $i -printf "%i\n" | sort -u | wc -l; done

# better way
find -maxdepth 1 ! -name . -type d -print0 | xargs -0I{} bash -c "echo -n '{}: '; find '{}' | wc -l"

function count_inodes() {
    find $1 -maxdepth 1 | wc -l

mdpuma

#!/bin/bash

ls -lahi | grep name

find -inum <INODE> -delete

mdpuma

#!/bin/bash

find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep -E "mail\s*\(" |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep -E 'eval\(|move_uploaded_file' |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep 'eval(stripslashes' |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep 'eval($_' |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep 'base64_decode(' |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep 'base64_encode(gzcompress' |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep "\\\x" |less
find ! -perm 000 -type f -name \*.php -print0 | xargs -0 -n2 grep -E "(system|exec)\(" |less

mdpuma

#!/bin/sh
#
# Send 60-byte packets at maximum rate through eth1 to 10.0.0.2.
# Additional arguments are passed on to configure the device under pktgen;
# try "pkt_size BYTES" or "rate US" or "ratep PPS".
#

thread=$1

modprobe pktgen

mdpuma

#!/bin/bash

USER=nobody
strace $(pgrep -u $USER | xargs -I{} echo -n "-p {} ") 2>&1

mdpuma

#!/bin/bash

current_time=$(date +%s)
target_time=$(date -d "$*" +%s)
seconds=$(( $target_time - $current_time ))
echo "sleeping $seconds (`date -d "$*"`)"
sleep $seconds


# Usage:

mdpuma

# cat httpd.conf
SetEnvIf X-Forwarded-Proto https HTTPS=on

# cat .htaccess
RewriteCond %{ENV:HTTPS} !=on
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1 [R=301,L]


RewriteEngine on
RewriteCond %{HTTP:X-Forwarded-Proto} !https

mdpuma

On Tue Oct 27, 2015, history.state.gov began buckling under load, intermittently issuing 500 errors. Nginx's error log was sprinkled with the following errors:

2015/10/27 21:48:36 [crit] 2475#0: accept4() failed (24: Too many open files) 2015/10/27 21:48:36 [alert] 2475#0: *7163915 socket() failed (24: Too many open files) while connecting to upstream...

An article at http://www.cyberciti.biz/faq/linux-unix-nginx-too-many-open-files/ provided directions that mostly worked. Below are the steps we followed. The steps that diverged from the article's directions are marked with an *.

1. • Instead of using su to run ulimit on the nginx account, use ps aux | grep nginx to locate nginx's process IDs. Then query each process's file handle limits using cat /proc/pid/limits (where pid is the process id retrieved from ps). (Note: sudo may be necessary on your system for the cat command here, depending on your system.)
2. Added fs.file-max = 70000 to /etc/sysctl.conf
3. Added `nginx soft nofile 1

mdpuma

conn %default
        keyexchange=ikev2
        type=tunnel
        auto=add
#       ike=aes256-sha1-modp1024!
#       esp=aes256-sha1!
        dpdaction=clear
        dpddelay=300s
        fragmentation=yes
        left=%any

mdpuma

#!/bin/bash
# install pv, mysql, ssh
# dbs contain list of databases

cat dbs | while read i; do
  echo "syncing '$i'"
  ssh -n root@178.33.37.57 "mysqldump $i | gzip -c" | pv | gzip -d | mysql $i
done

# clone mysql users privileges