Version 2.1.15

Added new cheatsheets.

bin/cheat

@@ -38,7 +38,7 @@ from docopt import docopt
 
 if __name__ == '__main__':
     # parse the command-line options
-    options = docopt(__doc__, version='cheat 2.1.13')
+    options = docopt(__doc__, version='cheat 2.1.15')
 
     # list directories
     if options['--directories']:

cheat/cheatsheets/apt-get

@@ -23,3 +23,6 @@ apt-get -o Dir::Cache="/path/to/destination/dir/" -o Dir::Cache::archives="./" i
 
 # Show apt-get installed packages.
 grep 'install ' /var/log/dpkg.log
+
+# Silently keep old configuration during batch updates
+apt-get update -o DPkg::Options::='--force-confold' ...

cheat/cheatsheets/awk

@@ -6,3 +6,6 @@ printf '1:2:3' | awk -F ":" '{print $1+$2+$3}'
 
 # print a multiplication table
 seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'
+
+# Specify output separator character
+printf '1 2 3' | awk 'BEGIN {OFS=":"}; {print $1,$2,$3}'

cheat/cheatsheets/bash

@@ -18,3 +18,10 @@ set -x
 
 # Turn off debugging:
 set +x
+
+# Retrieve N-th piped command exit status
+printf 'foo' | fgrep 'foo' | sed 's/foo/bar/'
+echo ${PIPESTATUS[0]}  # replace 0 with N
+
+# Lock file:
+( set -o noclobber; echo > my.lock ) || echo 'Failed to create lock file'

cheat/cheatsheets/cups

@@ -0,0 +1,22 @@
+# Manage printers through CUPS:
+http://localhost:631 (in web browser)
+
+# Print file from command line
+lp myfile.txt
+
+# Display print queue
+lpq
+
+# Remove print job from queue
+lprm 545
+or
+lprm -
+
+# Print log location
+/var/log/cups
+
+# Reject new jobs
+cupsreject printername
+
+# Accept new jobs
+cupsaccept printername

cheat/cheatsheets/hardware-info

@@ -0,0 +1,32 @@
+# Display all hardware details
+sudo lshw
+
+# List currently loaded kernel modules
+lsmod
+
+# List all modules available to the system
+find /lib/modules/$(uname -r) -type f -iname "*.ko"
+
+# Load a module into kernel
+modprobe modulename
+
+# Remove a module from kernel 
+modprobe -r modulename
+
+# List devices connected via pci bus
+lspci
+
+# Debug output for pci devices (hex)
+lspci -vvxxx
+
+# Display cpu hardware stats
+cat /proc/cpuinfo
+
+# Display memory hardware stats
+cat /proc/meminfo
+
+# Output the kernel ring buffer
+dmesg
+
+# Ouput kernel messages
+dmesg --kernel

cheat/cheatsheets/lib

@@ -0,0 +1,23 @@
+# Display available libraries
+ldconfig -p
+
+# Update library resources
+ldconfig
+
+# Display libraries and file location
+ldd
+
+# Libraries available to apps in real-time
+"Dynamic Libraries" (.so.)
+
+# Libraries only available to apps when installed (imported)
+"Static Libraries" (.a.)
+
+# Standard (usual) library file location
+/lib
+
+# Sofware-accessible source for library info 
+/etc/ld.so.cache 	# (binary)
+
+# Human-readable source for library info
+/etc/ld.so.conf 	# (points to /etc/ld.so.conf.d)

cheat/cheatsheets/ntp

@@ -0,0 +1,33 @@
+# Verify ntpd running:
+service ntp status
+
+# Start ntpd if not running:
+service ntp start
+
+# Display current hardware clock value:
+sudo hwclock -r
+
+# Apply system time to hardware time:
+sudo hwclock --systohc
+
+# Apply hardware time to system time:
+sudo hwclock --hctosys
+
+# Set hwclock to local time:
+sudo hwclock --localtime
+
+# Set hwclock to UTC:
+sudo hwclock --utc
+
+# Set hwclock manually:
+sudo hwclock --set --date="8/10/15 13:10:05"
+
+# Query surrounding stratum time servers
+ntpq -pn
+
+# Config file:
+/etc/ntp.conf
+
+# Driftfile:
+location of "drift" of your system clock compared to ntp servers
+/var/lib/ntp/ntp.drift

cheat/cheatsheets/openssl

@@ -19,3 +19,6 @@ openssl x509 -text -noout -in server.crt
 echo | openssl s_client -connect <hostname>:443 2> /dev/null | \
 awk '/-----BEGIN/,/END CERTIFICATE-----/' | \
 openssl x509 -noout -enddate
+
+# Generate Diffie-Hellman parameters:
+openssl dhparam -outform PEM -out dhparams.pem 2048

cheat/cheatsheets/ping

@@ -0,0 +1,5 @@
+# ping a host with a total count of 15 packets overall.    
+ping -c 15 www.example.com
+
+# ping a host with a total count of 15 packets overall, one every .5 seconds (faster ping). 
+ping -c 15 -i .5 www.example.com

cheat/cheatsheets/rpm

@@ -4,6 +4,9 @@ rpm -ivh <rpm>
 # To remove a package:
 rpm -e <package>
 
+# To remove a package, but not its dependencies
+rpm -e --nodeps <package>
+
 # To find what package installs a file:
 rpm -qf </path/to/file>
 
@@ -17,3 +20,12 @@ rpm -q --whatrequires <file>
 
 # To list all installed packages:
 rpm -qa
+
+# To find a pkg's dependencies
+rpm -i --test <package>
+
+# Display checksum against source
+rpm -K <package>
+
+# Verify a package
+rpm -V <package>

cheat/cheatsheets/rss2email

@@ -0,0 +1,21 @@
+'rss2email -- converts rss feeds and emails them to your inbox'
+
+# List all feeds 
+r2e list
+
+# Convert RSS entries to email
+r2e run
+
+# Add a new feed
+r2e add <feed address>
+
+# Add a new feed with new email address
+r2e add <feed address> [newemail address]
+
+# Delete a feed 
+r2e delete <# of feed in list/>
+
+# Help
+r2e -h
+
+

cheat/cheatsheets/systemd

@@ -0,0 +1,18 @@
+# Display process startup time
+systemd-analyze
+
+# Display process startup time at service level
+systemd-analyze blame
+
+# List running units
+systemctl list-units
+
+# Load a unit at startup
+systemctl enable foo.service
+
+# Start or Stop a unit
+systemctl <start | stop> foo.service
+
+# Unit file locations
+/etc/systemd/system
+/usr/lib/systemd/system

cheat/cheatsheets/tar

@@ -24,3 +24,8 @@ tar -jtvf /path/to/foo.tgz
 
 # To create a .gz archive and exclude all jpg,gif,... from the tgz
 tar czvf /path/to/foo.tgz --exclude=\*.{jpg,gif,png,wmv,flv,tar.gz,zip} /path/to/foo/
+
+# To use parallel (multi-threaded) implementation of compression algorithms:
+tar -z ... -> tar -Ipigz ...
+tar -j ... -> tar -Ipbzip2 ...
+tar -J ... -> tar -Ipixz ...

cheat/cheatsheets/vagrant

@@ -0,0 +1,33 @@
+# Initate Vagrant
+mkdir vag-vm; cd vag-vm
+vagrant init
+
+# Add a box to vagrant repo
+vagrant box add hashicorp/precise32
+
+# Add a box  Vagrant file
+config.vm.box = "hashicorp/precise32"
+
+# Add vm to public network as host
+config.vm.network "public_network"
+
+# Add provision script to vagrant file
+config.vm.provision :shell, path: "provision.sh"
+
+# Start vm 
+vagrant up
+
+# Connect to started instance
+vagrant ssh
+
+# Shutdown vm
+vagrant halt
+
+# Hibernate vm
+vagrant suspend
+
+# Set vm to initial state by cleaning all data
+vagrant destroy
+
+# Restart vm with new provision script
+vagran reload --provision

setup.py

@@ -3,7 +3,7 @@ import os
 
 setup(
     name         = 'cheat',
-    version      = '2.1.13',
+    version      = '2.1.15',
     author       = 'Chris Lane',
     author_email = 'chris@chris-allen-lane.com',
     license      = 'GPL3',