Léo Léopold Hertz 준영's questions

I forgot how to do this procedure.

I did on OSX 10.9.1

• run ssh-keygen in my server
• moved the private-key id_rsa to my laptop's $HOME/.ssh/id_rsa, removed the private key id_rsa from my server
• create the following $HOME/.ssh/config in my laptop
• run ssh-add $HOME/.ssh/id_rsa

My .ssh/config

Host server.myhomepage.com
  User masi
  Port 22
  Hostname server.myhomepage.com
  IdentityFile ~/.ssh/id_rsa
  TCPKeepAlive yes
  IdentitiesOnly yes

I run

ssh-add .ssh/id_rsa 
Enter passphrase for .ssh/id_rsa: 
Identity added: .ssh/id_rsa (.ssh/id_rsa)

and running more

ssh server.myhomepage.com
Saving password to keychain failed

and it asked my passphrase for my id_rsa in a graphical window which I gave correctly but get failed message. Then, it asks in the terminal if I enter correctly the password for my private key but showed still the failed message. I run many times with correct password

Identity added: /Users/masi/.ssh/id_rsa (/Users/masi/.ssh/id_rsa)
[email protected]'s password: 
Permission denied, please try again.

I forgot how to do this procedure correctly. How can you have the key in your keychain correctly?

How can you stop the program?

My auth.log has regularly similar entries as follows

Jan  2 03:15:01 lumi CRON[28939]: pam_unix(cron:session): session opened for user svn-autoreleasedeb by (uid=0)
Jan  2 03:15:01 lumi CRON[28939]: pam_unix(cron:session): session closed for user svn-autoreleasedeb
Jan  2 03:17:01 lumi CRON[28949]: pam_unix(cron:session): session opened for user root by (uid=0)
Jan  2 03:17:01 lumi CRON[28949]: pam_unix(cron:session): session closed for user root
Jan  2 03:20:01 lumi CRON[28955]: pam_unix(cron:session): session opened for user svn-autoreleasedeb by (uid=0)
Jan  2 03:20:01 lumi CRON[28955]: pam_unix(cron:session): session closed for user svn-autoreleasedeb
Jan  2 03:25:01 lumi CRON[29370]: pam_unix(cron:session): session opened for user svn-autoreleasedeb by (uid=0)
Jan  2 03:25:01 lumi CRON[29370]: pam_unix(cron:session): session closed for user svn-autoreleasedeb
Jan  2 03:30:01 lumi CRON[29467]: pam_unix(cron:session): session opened for user svn-autoreleasedeb by (uid=0)
Jan  2 03:30:01 lumi CRON[29467]: pam_unix(cron:session): session closed for user svn-autoreleasedeb
Jan  2 03:35:01 lumi CRON[29499]: pam_unix(cron:session): session opened for user svn-autoreleasedeb by (uid=0)
Jan  2 03:35:01 lumi CRON[29499]: pam_unix(cron:session): session closed for user svn-autoreleasedeb

How can you set up a DHCP for OSX such that you can access your Macbook's shared network by iPod Touch?

I have enabled internet sharing in OSX settings such that you I access the sharing by iPod. However, I do not get the internet.

I have in Network settings > TCP/IP > Configure IPv4: Using DHCP.

I run the network with Using DHCP with manual address unsuccessfully. I used my real ip-address in the airport setting.

I am completing my first database project. I am going to set up mod_wsgi to Apache such that I can run Python webframework on my Uni's servers. I am not sure whether my Uni has those tools or not.

My Uni gives me no support in Python and its config to their servers.

I would like to know a way to get info about the servers in the shell such that I can decide whether to use their supported tools (Oracle, PHP), or tools which I like (Python, MySQL).

Which commands can you run to get info about the servers such that I can decide which tools to use?

I would like to have the following code in my .screenrc

 source /Users/masi/bin/screen/file.screen

However, I observe that sourcing at .screenrc is not supported.

Whi is sourcing in .screenrc not supported?

I see

alt text http://files.getdropbox.com/u/175564/fileformat-problem.png

where I have ^M and ^[ at various places. The former seems to be enter, while the latter apparently the end/beginning of the line.

I would like to get the purple symbols out such that I can read the log -file better.

I run

:set fileformats=unix,dos,mac
:e

but I get the same output.

How can you get the encoding/fileformat right?

I see

alt text http://files.getdropbox.com/u/175564/screen-bigger.png

where I have two windows open in Screen's split.

I would like to increase the zise of the window at the bottom by

Ctrl-A [number] +

similarly as you can do in Vim.

I did not find a solution by Google.

How can you increase the size of the window in Screen?

The question is based on this answer.

How can you set the -R in your LESS environment variable?

I was completing the instructions in finding MySQL's password, when I saw this

[some image of virus mails but lost]

My var at Root has the folder /var/virusmails which name is strange.

The user of the folder is _amavisd which I do not know. The same user has also the folder amavis such that

0 drwxr-xr-x   6 _amavisd  _amavisd   204B May 31  2008 amavis
0 drwxr-xr-x   2 _amavisd  _amavisd    68B May 31  2008 virusmails

Amavis seems to be a virus-scanner provider. However, I have not installed the files. This suggests me that the files are built into OS X.

I am interested in which components use the virus-scanner in OS X. I have never noted it to be running.

Which OS X components need the Amavis Virus-scanner?

I run

mysqladmin5 -u root -p ping 

I get a password request.

I found the following instructions but they seem to be rather brutal

<<
After installing MySQL 5 on Solaris with pkgadd you will have to perform
the following post-installation tasks:
As root:
# rm -rf /var/lib/mysql/mysql
Then as mysql:
$ cd /opt/mysql/mysql
$ scripts/mysql_install_db
Then as root:
# /etc/init.d/mysql start
Then as mysql:
$ /opt/mysql/mysql/bin/mysqladmin -u root password 'password'
Then as root:
# /opt/mysql/mysql/bin/mysql_secure_installation
>>

The password was not blank as in some versions of MySQL.

Thank you for pointing that out! The version of my MySQL seems to be

mysql5 --version     
mysql5  Ver 14.12 Distrib 5.0.83, for apple-darwin9.7.0 (i386) using readline 6.0

What is the default password of the MySQL?

I have in .zshrc

 setopt autopushd

It makes cd acts like pushd. This means that we have no stack at all. When I have used it, I have not used stack at all, since it removes stack from me.

I am not sure what is the benefit of autopushd.

What is the benefit of autopushd?

This question is based on the thread.

I would like to read the documentation of the link "Expression" which is in the mentioned-thraed.

The problem is that I cannot use cursor to locate the link and then press enter.

How can you read a link in your Find's manual?

The following command gives me in the pager Most/Less

man -k background

alt text http://files.getdropbox.com/u/175564/apropos-colors.png

The picture has everything in green, even descriptions. I would like to set them yellow.

How can you have set the descriptions yellow in Less/Most by Less_termcap?

My variables which affect Less

     export LESS_TERMCAP_mb=$'\E[01;31m'         # begin blinking
     export LESS_TERMCAP_md=$'\E[01;38;5;74m'    # bold in blue
     export LESS_TERMCAP_me=$'\E[0m'        # end mode

     export LESS_TERMCAP_se=$'\E[0m'        # end standout-mode
     export LESS_TERMCAP_so=$'\E[38;5;246m' # begin standout-mode - info box
     export LESS_TERMCAP_ue=$'\E[0m'        # end underline

     export LESS_TERMCAP_us=$'\E[04;33;146m'    # begin underline is now yellow
     #                             |  |  |
     #                             |  |----------------- yellow
     #                             |-------------------- underline

     # to have the indication of cursor's location and line numbers
     export LESS="-mN"

Problem: to change the bolding which affects the word "expression" to the color yellow in Less: alt text http://files.getdropbox.com/u/175564/man-bolding-highlight.png

My commands which affects Less

export LESS_TERMCAP_mb=$'\E[01;31m'     # begin blinking
export LESS_TERMCAP_md=$'\E[01;31m'    # begin bold          
export LESS_TERMCAP_me=$'\E[0m'        # end mode
export LESS_TERMCAP_se=$'\E[0m'        # end standout-mode
export LESS_TERMCAP_so=$'\E[01;44;33m' # begin standout-mode
export LESS_TERMCAP_ue=$'\E[0m'        # end underline
export LESS_TERMCAP_us=$'\E[01;32m'    # begin underline

How can you change the bolding to yellow?

I find the synopsis of Find's manual difficult to read alt text http://files.getdropbox.com/u/175564/syntax_manual.png

Let's assume that you are finding directories with 777 permissions. Pixelbeat's suggestion is

find -type d ! -perm -777

My OS/X gives the following

find: illegal option -- t
find: illegal option -- y
find: illegal option -- p
find: illegal option -- e
find: d: No such file or directory

Things about which I am not sure when using the synopsis as a help

• unable to see where to put the option -type: I can clearly test this, but I want to learn to read manuals better such that I do not need ask help.
• unable to understand why we need two lines for synopsis: it seems to emphasize that many PATHs are optional
• why does Pixelbeat use an exclamation mark in the command?

Let's have another example of Grep's manual.

alt text http://files.getdropbox.com/u/175564/grep_manual.png

It has a clear synopsis although I would just use one line for it. I can see directly that we can grep by

grep -r "masi" .

How do you read manuals similar to Find's manual?

I downloaded the newest Valgrind and extracted it.

I run

./configure --prefix=/usr/local/valgrind
make

which gives me

make: *** No targets specified and no makefile found.  Stop.

I run

make install

It gives me

make: Nothing to be done for `install'.

How can you install Valgrind to the newest OS X?

I registered a domain by Bluehost. However, I could not set up the domain correctly for Google sites at Bluehost:

alt text http://files.getdropbox.com/u/175564/domainBluehostGoogle.png

Google's instructions

1. Sign in to your domain hosting service and locate the DNS management page. The location varies by service, but can typically be found under Domain Management or Advanced Settings .

   2. Use the following unique string to create a new CNAME record for the domain.com domain:

      googlea0406ece---

   3. Point the CNAME record to:

      google.com

   4. Once you have made the changes, you can verify that the record exists by doing a CNAME lookup for http://googlea0406ece---.domain.com . You can find several web sites to do automated CNAME lookups by searching for CNAME lookup at http://www.google.com

How can you assign a domain to Google Sites which is registered by Bluehost?

I have an alias for

alias tdA='todo -a'

I get the following in Zsh

tdA          
zsh: correct 'tdA' to 'tda' [nyae]? 

How can you make Zsh not to suggest a fix for an alias?

I use SSH keys without passphrase with private/public keys.

I read O'reilly's SSH book that you can have encrypted SSH keys without passphrase by

1. SSH agent,
2. Host based authentication, or
3. Kerberos authentication

I am not completely sure what they mean with these.

How would you have an encrypted SSH for active usage?

I installed the Microsoft's Keyboard drivers for my Natural Ergonomic 4000.

My customized keyboard is now broken. I want to uninstall the drivers. I removed the buttons for MS keyboard at Preferences, but this did not remove the drivers.

How can you uninstall the keyboard drivers?