boywijnmaalen

# Recursively change permissions on directories only:

$ find . -type d -exec chmod 777 {} \;

# Breaking it down:

# Uses the find command on the current directory .
# -type d tells find to only look for files of type directory
# -exec tells find to perform the following action on each matching file. In this case it was to chmod each directory to 777.
# This same technique can be used to chown directories and/or perform the same actions on only files.

boywijnmaalen

# For reference;
# Install:  https://github.com/OzzyCzech/dotfiles/blob/master/how-to-install-mac.md
# Brew:     https://github.com/Homebrew/brew/blob/master/share/doc/homebrew/FAQ.md

# Start LEMP stack:
$ sudo nginx && launchctl load -w /usr/local/opt/php71/homebrew.mxcl.php71.plist && launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.blackfire-agent.plist && mysql.server start

# Stop LEMP stack:
$ sudo nginx -s stop && launchctl unload -w /usr/local/opt/php71/homebrew.mxcl.php71.plist && launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.blackfire-agent.plist && mysql.server stop

boywijnmaalen

# (must sometimes become root first)

$ su <username>

boywijnmaalen

# show branch history
$ tig <branch_name>

# compare two branches
$ tig <branch_name>..<branch_name>

boywijnmaalen

$ mysqldbcompare --server1=<username>:<password>@localhost --server2=<username>:<password>@localhost --difftype=sql --run-all-tests --changes-for=server2 db_name_1:db_name_2

boywijnmaalen

$ git commit --amend -c <COMMIT HASH>

boywijnmaalen

# vim git-author-rewrite.sh
# Copy and paste the script, replacing the following variables based on the information you gathered:

```
#!/bin/sh

git filter-branch --env-filter '
OLD_EMAIL="<old email address>"
CORRECT_NAME="<name>"
CORRECT_EMAIL="<new email address>"

boywijnmaalen

# removes all tags remotly
$ git tag -l | xargs -n 1 git push --delete origin

# removes all tags locally
$ git tag | xargs git tag -d

boywijnmaalen

# To copy a file from B to A while logged into B:
$ scp /path/to/file username@a:/path/to/destination

# To copy a file from B to A while logged into A:
$ scp username@b:/path/to/file /path/to/destination

boywijnmaalen

# how to retrieve the hash for the current commit in Git?
$ git rev-parse HEAD

# how do I delete a tag from a Git repo?
$ git tag -d release01
$ git push origin :refs/tags/release01