Welcome to the Linux Foundation Forum!
getting remote output with expect
Options
sam.albuquerque
Posts: 13
in Command Line
I'm working some embedded boxes with limited functionality. They run Linux(busybox shell). Its not fullfledged. only some of our custom code..
I need to reboot the box at times or run commands like top on it.
I tried my hands at using expect using simple expect, send, send_user sequences.
However, although I can login to the box, I cannot issue any other command once in.
I've tried to expect " # " thinking that it will wait for the # in the bash prompt and then send a command\r But doesnot help.
Can any one guide where I'm going wrong?
0
Comments
-
IF i understood your question, then you need openssh.
openssh has 2 parts: server and client. On the other boxes you have to run the server (make it to run on startup) and from your PC you have to run the client like:ssh root@192.168.1.10
where the IP is the IP of the remote computer, and root is the account you want to login.
there are great security options for openssh, look at the manual for that.
good luck and i hope you know the base bash commands (otherwise look at the Bash group at the community section).0 -
I agree.
download @ http://www.openssh.org/portable.html if you don't have it
edit: if you're trying to execute a command on multiple machines
there's some neat little for loops you can do with ssh to make that happen
ssh-keygen -t rsa
scp ~/.ssh/id_rsa.pub user@host (for each individual hosts)
ssh into the first machine
cat ~/id_rsa.pub >> ~/.ssh/authorized_keys2
chmod 644 ~/.ssh/authorized_keys2
(do this for each machine)
now make a list on the workstation for each host
hosts.dat
192.168.1.1
192.168.1.2
192.168.1.3 and so on
now,
for i in `cat hosts.dat`; do ssh root@$i commands..; done
I have done this in the past -- It may need some tweaks or may not -- but if it's something that looks like what you want to do, its worth exploring0 -
I know about SSH. and the box in question is not a computer. It is a Set-top-box. Since it is a box with a very limited footprint, SSH cannot be installed on it.
"expect" is what I expect to use over here..
"man 1 expect" for details on the expect interpreter0 -
I did find a solution to my woes. I needed to use the interact command in order to execute the commands in the remote shell.
However now I cannot execute it if it is run from a cron..
nevermind thou, I found another solution to my original problem(which was taking snapshot of the device's memory)0
Categories
- All Categories
- 64 LFX Mentorship
- 117 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 322 Cloud Engineer IT Professional Program
- 141 Advanced Cloud Engineer IT Professional Program
- 56 DevOps Engineer IT Professional Program
- 67 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.4K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 178 LFD103 Class Forum
- LFD110 Class Forum
- 24 LFD121 Class Forum
- LFD133 Class Forum
- 2 LFD137 Class Forum
- 62 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD233 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 660 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 1 LFS101 Class Forum
- LFS116 Class Forum
- 2 LFS145 Class Forum
- LFS151 Class Forum
- LFS158 Class Forum
- LFS167 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 13 LFS203 Class Forum
- 98 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 38 LFS243 Class Forum
- 12 LFS244 Class Forum
- LFS245 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 143 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- 2 LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 109 LFS260 Class Forum
- 147 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 21 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 258 LFW211 Class Forum
- 179 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 908 Hardware
- 221 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 765 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 144 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 484 Linux System Administration
- 40 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 52 Web Management
- 75 Mobile Computing
- 25 Android
- 35 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 544 Off Topic
- 131 Introductions
- 223 Small Talk
- 22 Study Material
- 836 Programming and Development
- 285 Kernel Development
- 517 Software Development
- 975 Software
- 261 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)