GNU/Linux, MacOS

Created: by Pradeep Gowda Updated: Mar 08, 2019

See also:

Keep in mind to explore:

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  • Upgrade ports and all other software: sudo port selfupdate and sudo port upgrade outdated.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

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

OpenBSD

Minix

Debian

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