## Brie Carranza's UNIX-y cheatsheet ##

# TiBS
bustatus == /usr/sbin/tera -Q

## View TiBS.ini
grep -v "^#" /etc/tibs/tibs.ini | sed '/^$/d'

# Extract a tarball without all the directory structure
tar zvxf whatever.tar.gz --strip-components 5

# View the default printer
lpoptions
lpq

# Print four pages on one sheet of paper
lpr -Pscs_public -o number-up=4 file.txt

# Fix system time on a VM
ntpdate clock-1.cs.cmu.edu
hwclock --systohc

# Check the hardware clock time
hwclock -r

# Query xrandr for available outputs
xrandr -q

# Rotate the screen
xrandr --output DVI-I-1 --rotate left 

# What files does an RPM file provide?
rpm -qlp fool.rpm

# What files does a package provide?
rpm -ql package-name

# What package provided a file?
yum provides /path/to/file*

# Report all current u(ser)limits
ulimit -a

# One of a million ways to check if a given Perl module is available and it's current version
/usr/bin/perl -MCPAN -e 'install Email::Send'

# Ubuntu LTS Release names
# 18.04 Bionic Beaver
# 16.04 Xenial Xerus
# 14.04 Trusty Tahr
# 12.04 Precise Pangolin
# 10.04 Lucid Lynx (EOL)

# Date the way you like it
# 2016-03-March-10
date +%Y-%m-%B-%d

# Unban an IP via fail2ban-client
# Get the name of the jail
fail2ban-client status
# Unban
fail2ban-client set sshd unbanip 8.8.8.8

# Change user's full name
chfn -f "Edward Xample" example

# Are ports 80 and 443 open?
nc -v -z cs.cmu.edu 80 443

##############
# VBoxManage #
##############
# List all VMs on a host
VBoxManage list vms

# Take a snapshot of a guest
/usr/bin/vboxmanage snapshot "compute-0-1" take snap-$(date +%Y-%m-%B-%d-at-%H-%M) --description "This snapshot was taken automatically at $(date). Brie created this script in February 2017." --live

# Turn a guest off rudely
VBoxManage controlvm "Rocks-Compute-0-0" poweroff 

# Extract the .spec file from a source RPM
rpm2cpio myrpm.src.rpm | cpio -civ '*.spec'

# Extract the files inside the RPM
rpm2cpio ./whatever.rpm | cpio -idmv

# To view a list of available shells, you can run:
ldapchsh -l

# To set your shell to /bin/bash, you would run:
ldapchsh -n /bin/bash

# To view network interface info
nmcli dev show eno1 		<-- Ubuntu 16.04
nmcli dev list iface em0 	<-- Ubuntu 14.04 and earlier

# Neatly print mounted filesystems
column -t < /proc/mounts

#########
# ROCKS #
#########
 # Rebuild a compute node
rocks run host compute-X-Y "/boot/kickstart/cluster-kickstart-pxe"

# Configure a compute node to rebuild at next PXE boot
rocks set host boot compute-0-0 action=install

# Query Ganglia info using ROCKS commands
rocks report host ganglia gmond compute-0-0

# Configure a node to run memtest when it reboots
rocks set host runaction compute-0-38 action=memtest

# Check on the status of a compute node as it rebuilds
# using this command or SSH on port 2200
rocks-console compute-0-0

# ROCKS requires a minimum amount of RAM in order to install a compute node. That value is higher than 400 MB but lower than 700 MB.

# Unable to get /share/apps mounted properly on a new 6.1.1 cluster?
mount --rbind /export  /share

# I am impatient and want to access the filesystem on a compute node while it rebuilds.
cd /mnt/sysimage

# X session on compute node
# Some resources will tell you to set ForwardX11Trusted to yes in /etc/ssh/ssh_config
# While this will work, you can instead:
ssh -Y head-node
ssh -Y compute-node

# Query 411 manually
/opt/rocks/bin/411get --master http://10.1.1.1:372/411.d --verbose --list-project-info

#######
# MPI #
#######

## Do your version of OpenMPI "hello, world"
## Each node in the file mpihosts will work on the job of printing the results of the hostname command
## You will see eight hostnames
mpirun -np 8 --hostfile mpihosts hostname

## What version of OpenMPI do I have?
ompi_info



#########
# SLURM #
#########
# Get an interactive list of the state of jobs, their owners, statuses, job IDs
smap -i2

# View nodes in DRAIN state (draining or drained) and info about why they are in that state (try with --noheader)
sinfo -R

# View all jobs since February 1st
sacct -S 0201

# Drain a node, Reason is required, a good reason is recommended
# There is a twenty character limit for the reason.
# You can use the same command to update the reason without resuming and re-draining the node.
scontrol update NodeName=compute-0-1 State=DRAIN Reason='Testing something'

# Resume a drained node
scontrol update NodeName=compute-0-1 State=RESUME

# List usernames with jobs running on localhost only (no jobs = no output)
squeue -w localhost --noheader -o %u

# Request an interactive job on a specific compute node
srun -N1 --mem=200 -w compute-0-1 --pty bash

# List configuration data for SLURM
# pipe to grep to find a specific setting
scontrol show config

# Create an ad-hoc, temporary partition
# Persists until SLURM config is resynchronized
scontrol create PartitionName=omglol Nodes=compute-0-[1-2] Shared=Yes

# Schedule a 2 hour reservation on August 4th starting at 16:00
scontrol create reservation starttime=2016-08-04T16:00:00 duration=120 user=root flags=maint,ignore_jobs nodes=ALL
# Delete the reservation with the name root_2 (the second reservation created by the user root)
scontrol delete ReservationName=root_2

#######
# PBS #
#######
# Set update_node_list to 0 in /etc/torque-roll.conf
# to prevent automatic updates (by ROCKS)
# Node list must be manually maintained in /opt/torque/server_priv/nodes

########
# RAID #
########
# Check on RAID status, resync%
cat /proc/mdstat

# Get even more general info
# including RAID level, # devices
sudo mdadm --detail /dev/md0

##########
# NVIDIA #
#########
# The SMI in nvidia-smi stands for:
System Management Interface

# Get all of the lspci output about VGA compatible controllers (sed to print until blank line)
lspci -vnn | sed -n '/VGA/,/^$/p'

# Print the NVIDIA driver version, once per host (not per GPU)
rocks run host compute "nvidia-smi --query-gpu=driver_version --format=csv,noheader|uniq"

##############
# TensorFlow #
##############
# print TF version
python -c 'import tensorflow as tf; print(tf.__version__)'
# TF "hello, world"
python -c "import tensorflow as tf ; tf.Session(config=tf.ConfigProto(log_device_placement=True))"

#########
# numpy #
#########
# print config info
python -c 'import numpy as np; np.__config__.show()'



#######
# SVN #
#######

# How do I move an SVN repo?
svnadmin dump /awesome/SVN-stuff/operation-marmalade >> operation-marmalade.dump
mkdir -p /usr0/SVN/op-marm/ && cd /usr0/SVN/op-marm/
svnadmin create .
svnadmin load /usr0/SVN/op-marm/ < /root/operation-marmalade.dump

###############
# Diagnostics #
###############
# Enable SAR - amd64_u*
# /etc/default/systat should contain:
ENABLED="true"

# View historical RAM usage 
sar -r

# View historical CPU usage
sar -u

# View historical disk I/O
sar -b

#################
# Miscellaneous #
#################
# Sample pv syntax
pv < OMG.txt | sha256sum

# Building a machine
## The new file system is mounted at
/target

#######
# NMH #
#######

# Tip: Add /usr/bin/mh to your path
# How many messages do I have?
/usr/bin/mh/msgchk

## Incorporate new messages in to your inbox
/usr/bin/mh/inc

## Read message 8
/usr/bin/mh mhshow 8
(You can also tack -type on to mhshow.)

## Test the format of a message
fmttest 7