I find myself searching for these commands more often than I should. So, until my mush brain remembers these I'll write them down here.
Archive a directory
tar -zcvf <archive_filename>.tar.gz /DIR/You/WANT/TO/ARCHIVE </archive_filename>
Extract .tar.gz file
tar -xvzf {filename.tar.gz}
MySQL
Backup
mysqldump -u {USER} -p {DATABASE_NAME} > {FILENAME.sql}
Restore
mysql -u {USER} -p {DATABASE_NAME} < {FILENAME.sql}
SCP
Copy local file to destination scp {LOCAL.file} {USER}@{SERVER.COM}:{~/path/to/destination} Copy remote file to local with .pem file scp -i {/path/to/pem.file} {USER}@{SERVER.COM}:{~/path/to/file} {/path/to/local/file} ** Note: don't include the braces in these commands.
Compile all access statistics from Jul 4-6 2013
find ./*/statistics/logs/access_log* -mtime -5 -exec zgrep -E "0[4-6]/Jul/2013:" {} \; > /root/Jul_04-06_logs.txt
Find files modified within the last 7 days
find /var/www/vhosts/*/httpdocs -type f -mtime -7 find /var/www/vhosts/*/httpdocs -type f -mtime -7 | xargs ls -lct > /root/recent_modified.log
Find files modified within the last 5 days sorted by newest first
find /var/www/vhosts/*/httpdocs/ -mtime -5 -type f -print0 | xargs -0 ls -al | sort -r
Count IP addresses in Apache log files
cat access.log | cut -d ' ' -f 1 | sort | uniq -c | sort -n
Compile a specific VHOST from the Apache 'other vhosts' Log files
find . -type f -exec grep 'VIRTUAL_HOST' '{}' \; > VIRTUAL_HOST.txt
Resources: - http://askubuntu.com/a/25348
Sum the file size from the ls command
ls -l | grep -e 'filename' | awk '{COUNT+=$5} END {print COUNT}'
Find the port number that a process is using
netstat -ltnp | grep -w ':80'
netstat -ltnp | grep '20000'