Find-Replace string in file's name

Add prefix or suffix

#add prefix
rename s/'^'/'MyPrefix'/ *

#add suffix
rename s/'$'/'MySuffix'/ *

#numbered
n=1; for f in ./*.jpg; do mv "$f" $n.jpg; n=$((n+1)); done

Find last 10 edited files on server

find . -type f -printf "%C@ %p\n" | sort -rn | head -n 10

// remove thumbs
find ./ \( -name '*x[0-9][0-9][0-9][0-9].*' -o -name '*x[0-9][0-9][0-9].*' -o -name '*x[0-9][0-9].*' \)  -delete

Find String in PHP files

find . -name '*.php' -exec grep -Hn 'SEARCHSTRING' '{}' \

grep --include=\*.{php,php6} -rnw './' -ie "SEARCH"

Unix commands

rename s/"SEARCH"/"REPLACE"/g *

//Replace Text
replace "old_string" "new_string" -- *.php

//Replace with regex
sed -i -- "s/<text .*svg>/<svg>/g" **.svg

//Find text in files
grep --include=\*.{php,php5} -rnw './' -e "NEEDLE"

//Chmod files and dirs
find /path/to/base/dir -type d -print0 | xargs -0 chmod 755 
find /path/to/base/dir -type f -print0 | xargs -0 chmod 644

Check disk space

sudo apt-get install ncdu
cd /
ncdu

Change /var/www

1. Create symlink in /var/ to mounted dir
2. Options in apache2.conf (AllowOverride All Require all granted)
3. ServerName in sites_available/default.conf
4. APACHE_RUN_USER in /envvars
5. sudo service apache2 restart

Root user

sudo mysql -u root
SELECT User,Host FROM mysql.user;
DROP USER 'root'@'localhost';
CREATE USER 'root'@'%' IDENTIFIED BY 'pass';
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
exit