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Top Forums Shell Programming and Scripting Running a command in another cli Post 302995332 by Junaid Subhani on Tuesday 4th of April 2017 03:31:57 PM
Old 04-04-2017
Running a command in another cli

I am writing a script to login to to a mongo DB node and get the status of that machine. The usual work flow is :

Code:
[root@mongodb-secondary-1 ~]# mongo admin -u root -p root 
MongoDB shell version: 3.0.11
connecting to: admin
rs0:SECONDARY>

Then in the new prompt I can run a command to check status :


Code:
rs0:SECONDARY> rs.status()
{
	"set" : "rs0",
	"date" : ISODate("2017-04-04T19:24:56.369Z"),
	"myState" : 2,
	"syncingTo" : "172.29.219.108:27017",
	"members" : [
		{
			"_id" : 0,
			"name" : "172.29.219.108:27017",
.
.
.

Now since I am loging into from another node, I want this all in one shot. Something like :

Code:
mongo admin -u root -p root ; rs.status()

But unfortunately this does not work. Any idea how I can send a command to another application CLI and get the status ?

---------- Post updated at 12:31 AM ---------- Previous update was at 12:26 AM ----------

Got the solution :

Code:
mongo admin -u root -p root --quiet --eval 'printjson(rs.status())'

 

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IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
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