command_line.md

Command line

Check syntax on all PHP files in a directory

for f in *.php; do php -l "$f"; done;

find . -type f -iname "*.php" -not -path '*vendor*'  -exec php -l {}  \;

Run a syntax check on only Git staged files.

git diff --diff-filter=ACM --cached --name-only | grep '.php' | xargs -I % php -l %

Exit during syntax checking if parse error is found (ex: CircleCI)

for file in $(find . -type f -iname "*.php" -not -path '*vendor*'); do php -l "$file"; done;

Find base64 encoded strings in php code

find . -name "*.php" -exec grep "base64" '{}' \; -print &> b64-detections.txt
find . -name "*.php" -exec grep "eval" '{}' \; -print &> eval-detections.txt

Run PHPCS on directory and save output

phpcs --report=full --report-file=~/Desktop/test.txt <dir>/

Filter a text document for only lines that contain “failed”

grep -E '[^ ]+ +Failed .*' logfile.txt > test.txt

Database monitoring

mysqladmin processlist -h <host> -u <user> --password=<mysql password>

Apache Benchmarking with 20 concurrent users

time ab -c 20 -n 1000 <url>

Show External URL

ip addr show eth0 | grep inet | awk '{ print $2; }' | sed 's/\/.*$//'

rsync with port and ignore existing files

rsync -rvz -e 'ssh -p <port>' --progress --ignore-existing <local dir> <user>@<host>:<remote dir>.

Screen

screen -S <nameofscreen> # creates a new screen session
<control>+a # and then d to detach from that session
screen -r <nameofscreen> # to jump back in
screen -x <nameofscreen> # to kill it

MySQL Constraints

echo "show variables like 'max_allowed_packet';" | mysql
echo "show variables like 'max_connections';" | mysql

Recursively Remove Subversion from Directory

find . -name '.svn' | xargs rm -r

OR

find . -name ".svn" -type d -exec rm -rf {} \;

Switch shell to use PHP7 by default for the current session

scl enable php70 /bin/bash

Swith to using PHP7

cd ~ && mkdir ~/bin && cd ~/bin && ln -s /usr/bin/php70 php

Then add export PATH=~/bin:$PATH to your ~/.bash_profile

Run PHPCBF on all PHP files in a directory except the vendor directory.

for file in $(find . -type f -iname "*.php" -not -path '*vendor*'); do phpcbf "$file"; done;

Run find/replace on files in an entire directory.

find ./ -name '*.php' | xargs perl -pi -e 's/<find>/<replace>/g'

Verify WordPress checksums for each site in a directory

for d in ./*/ ; do (cd "$d" && echo "Entering $d" && wp core verify-checksums --version=$(wp core version) && wp plugin verify-checksums); done

Get MD5 fingerprint for pubkey

ssh-keygen -E md5 -lf ssh_host_ecdsa_key.pub

Parse XML for specific node

cat file.xml | xmlstarlet sel -t -m -n "/rss/channel/item" -v "listing_title"

Find directory size

du -sh -- *

Get information about top 5 PIDs

watch "ps aux | sort -nrk 3,3 | head -n 5"