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hg log -l 5 --template "{branch} {date|shortdate} {rev}|{node} {user} stats:{diffstat}       {desc}\n"

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# Copies files from source to dest with specified date-time format
exiftool -o destDir '-FileName<FileModifyDate' '-FileName<DateCreated' '-FileName<ModifyDate' '-FileName<DateTimeCreated' '-FileName<DateTimeOriginal' -d %Y%m%d_%H%M%S%%-c.%%le -r sourceDir

# Move files from source to dest with specified directory date format
exiftool '-Directory<FileModifyDate' '-Directory<DateCreated' '-Directory<ModifyDate' '-Directory<DateTimeCreated' '-Directory<DateTimeOriginal' -d destDir/%Y-%m-%d -r sourceDir

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liquibase --driver=com.microsoft.sqlserver.jdbc.SQLServerDriver --url=jdbc:sqlserver@localhost:1324:db --username=sa --password= diff --referenceUrl=jdbc:sqlserver@localhost:1324:refdb --referenceUsername=user --referencePassword=password

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Magic words:

psql -U postgres

If run with -E flag, it will describe the underlaying queries of the \ commands (cool for learning!).

Most \d commands support additional param of __schema__.name__ and accept wildcards like *.*

• \q: Quit/Exit
• \c __database__: Connect to a database

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# adding and committing
git add -A                        # stages All
git add .                         # stages new and modified, without deleted
git add -u                        # stages modified and deleted, without new
git commit --amend                # Add staged changes to previous commit. Do not use if commit has been pushed.
git commit --amend --no-edit      # Do so without having to edit the commit message.

# remotes - pushing, pulling, and tracking
git fetch                         # gets remote objects and refs. Needed if new branches were added on the remote.
git remote -v                     # Lists all remotes (verbose)

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class Solution {
    public int solution(int[] A) {
        int N = A.length;
        double sum = 0;
        for (double i : A) {
            sum += i;
        }

        if (N == 1) return 0;
        double left = 0;

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tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

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fdisk -l 
umount sdx_
dd if=/path/to/file.iso of=/dev/sdx bs=4M

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find . -name "*.epub" -exec sh -c 'ebook-convert "{}" "$(dirname "{}")/$(basename -s .epub "{}").mobi" &' \;

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An Ansible summary

Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)

Configuration file

intro_configuration.html

First one found from of