POSIX regular expression cheatsheet

Tags:

Alphabetic [:alpha:]
Alphanumeric [:alnum:]
Control characters [:cntrl:]
Hex numbers [:xdigit:]
Lowercase [:lower:]
Nonespace characters [:graph:]
Numbers [:digit:]
Printable [:print:]
Punctuation [:punct:]
Tab or space [:blank:]
Uppercase [:upper:]
White space [:space:]

GNU Screen cheatsheet

Tags:

Change to other region ctrl-a tab
Change to other screen ctrl-a 0-9
Detach ctrl-a d
Help ctrl-a ?
Kill screen ctrl-a \
Kill region ctrl-a x
New screen ctrl-a c
Reattach screen -r
Serial connection screen /dev/ttyUSB0 9600
Split ctrl-a s

Debian Apt Cheatsheet

Tags:

Download and build source package apt-get -b source
Download and install dependencies for source package apt-get build-dep
Download source package apt-get source
Install package "on demand" auto-apt run
List contents of a package apt-file list
List installed packages dpkg -l
Remove package and configuration files apt-get --purge remove
Search for Debian Packages http://www.debian.org/distrib/packages
Search for packages apt-cache search
Show package dependencies apt-cache depends
Show package information apt-cache show
Show package that supplies a given file apt-file search
Show package that supplies a given file COLUMNS=132 dpkg -S
Show source package information apt-cache showsrc
Update `apt-file and auto-apt database apt-file update

Heartbeat 2 cheatsheet

Tags:

Commands

List cluster resources. crm_resource -L
Dump cluster configuration as xml to stdout. cibadmin -Q
Place node in standby (maintenance mode). Technically this is adding the standby property. crm_standby -U -v true
Place local node in standby. crm_standby -v true
Place node online or remove the standby property. crm_standby -D -U
Place local node online or remove standby property. crm_standby -D
View cluster status. One time to stdout. crm_mon -1
View cluster status. Refresh every 3s. crm_mon -i3
One line simple output. crm_mon -s
Show inactive resources. crm_mon -r
Stop resource. crm_resource -r -p target_role -v stopped
Start resource. crm_resource -r -p target_role -v started
Clear failed resource. crm_resource -C -H -r
Query running cluster for current state (STDOUT). cibadmin -Q --obj_type resources