GNU/Linux, MacOS

See also:

• Unix Toolbox @ http://cb.vu – “a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users.”; Bro pages.
• Introduction :: cli.fan — Improving your workflow since 2019
  • Inconsolation | Adventures with lightweight and minimalist software for Linux
  • Arabesque | Systems, Tools, and Terminal Science

Keep in mind to explore:

• runit - a Unix init scheme with service supervision; [HN](https://news.ycombinator.com/item?id=10059896; Svsh - a shell for runit.
• runwhen - a set of utilities for running commands at particular times. [alternate for cron]
• ^^ Both runit and runwhen are part of daemontools slashpackage

Notes

• To convert the .pub file into pem format – ssh-keygen -f rsa.pub -e -m pem
• pidof <appname> returns the pid of the application. useful for killing the app etc..
• The sock file for mysql5 installed using macports lives at /opt/local/var/run/mysql5/mysqld.sock . You will need this when using thirdy party SQL clients such as Seqel Pro
• Use python_select to select the default python that is used on your mac.
• If a download is corrupted while installing from macports, try sudo port clean --all <the offending package>
• Upgrade ports and all other software: sudo port selfupdate and sudo port upgrade outdated.
• X environment tricks for Mac OS X.

Pick up *NIX skills

• Miguel Icaza’s recommendations. circa 2011. HN
• Bash/Shell productivity tips.

Installing OpenJDK on Mac OSX

• Download Soylatte
• Unzip to \~

• Edit ~/.bashrc and add these lines:

   JAVA_HOME=~/java
   export JAVA_HOME
   export PATH=~/java/bin:$PATH
   

• activate changes with $source ~/.bashrc

Burning ISO images to CD/DVD from shell

DVD:

$ growisofs -dvd-compat -Z /dev/hdc=dvd.iso

CD: Find out the cd recording device using cdrecord -scanbus

$ $ cdrecord -scanbus
scsibus2:
        2,0,0   200) 'HL-DT-ST' 'DVDRAM GH22NS50 ' 'TN01' Removable CD-ROM

Use cdrecord to burn.

$ cdrecord -v -dao dev=2,0,0 speed=8 file.iso

don’t want namservers handed out by local DHCP server?

Comment out domain-name-servers, in /etc/dhcp/dhclient.conf.

Tell apt to add new pgp key to its list

$ curl -s http://someurl/key.pgp | sudo apt-key add -
$ sudo apt-key list

Label Drives using e2label command

$ sudo e2label /dev/sdg1 emdebian

Compiling stuff in 32 bit mode on Mac OSX 10.6

Add these flags to ./configure.

CFLAGS="-O -arch i386" CXXFLAGS="-O -arch i386" LDFLAGS="-arch i386"

Produce print ready copies of man docs

$ man -t `man -w tmux` | ps2pdf - tmux.pdf

Change keyboard layout in the shell

$ setxkbmap us

2014/11/25: swapped caps and left-ctrl. Put line below in /etc/default/keyboard

XKBOPTIONS="lv3:ralt_alt,compose:menu,ctrl:nocaps"

and run sudo dpkg-reconfigure keyboard-configuration and confirm changes to keep the changes you have made.

find memory usage by a process(?)

$ ps -Ao pid,rsz,args | grep <name>

src

Enabling anti-aliased fonts on Ubuntu

Edit $IDEA/bin/idea.vmoptions file and add these options:

-Dswing.aatext=true
-Dawt.useSystemAAFontSettings=lcd

The above options managed to get smooth font rendering on Ubuntu 12.10 using OpenJDK7.

Resources

• Setting up email server etc.,
• Linux inside a git book exploring how booting, initialization, interrupts, system calls, memory management etc., works.
• How to make an operating system

OpenBSD

• Learn to tame openbsd quickly

Minix

• Lessons Learned from 30 Years of MINIX | March 2016 | Communications of the ACM by Andrew S. Tanenbaum

Debian

• Apt transport for S3 - Lucidchart

Measuring stuff

• osquery – allows you to easily ask questions about your Linux and OSX infrastructure. Whether your goal is intrusion detection, infrastructure reliability, or compliance.

Running log of things

• Nixers newsletter – weekly newsletter about *NIX things. This is a slow and steady way to read stuff :)
• division by zero links to *nix afficionados.