Answer:

In Mercurial, if you want to revert the effect of an earlier changeset, even the changes have been pushed to remote, it is still possible with the hg backout command.

1. Find the revision you want to backout using hg log
# hg log

2. Assume you want to backout to the revision 99, then you can
# hg backout -r 99

Answer:

To show list of files are currently ignored by Mercurial, e.g. to check if your .hgignore is working.

You can use the following command in your working repository:

# hg st -i

Answer:

To setup your Mercurial's username, you need to create the file .hgrc in your home folder,

e.g.

# touch ~/.hgrc

And add the following lines:

[ui]
username = John Doe <john@example.com>

Answer:

To clone a remote Mercurial repository over SSH, is easy with the following command.

E.g.

# hg clone ssh://john@remote-host//remote-folder /local-folder

The key is the double slash //

That's it.

Answer:

When you want to revert your local changes by executing the command "hg revert filename", Mercurial will save your changes in the file "filename.orig".

To skip this, use the option - "--no-backup"

E.g.

# hg revert --no-backup filename

Answer:

Save the following lines as .hgignore and put it under the root of your project root directory, Mercurial will ignore them automatically.

^build/*
\.mode1v3
\.pbxuser
\.DS_Store
^\.*

Answer:

The following script add the ignore function to the Mercurial

#!/usr/bin/env python
"""Ignore pathnames and patterns"""
import os
def ignore(ui, repo, *pathnames):
    """Ignore the given pathnames and patterns."""
    outf = open(os.path.join(repo.root, ".hgignore"), "a")
    for p in pathnames:
        outf.write(p + "\n")
    outf.close()
    return
cmdtable = {
    'ignore': (ignore, [], "hg ignore pathname [pathname]"),
}

Save the script as ignore.py (e.g. ~/hg/ignore.py), and add the following line in your own ~/.hgrc

[extensions]
ignore = ~/hg/ignore.py

Reference: http://dmoonc.com/blog/?p=266

Answer:

To clone an existing Mercurial project, use the following simple command:

# hg clone https://bitbucket.org/ellislab/codeigniter

That's all.