expect: get error status when spawn command fails
The below is the sample of a script which we execute daily for getting info from the server. For the last couple of days, some server data is missing from the output which is captured on the local...
View ArticleExpect script + automated telnet process between three Linux machines
Is it possible to do the following by expect script? I have Linux server that connected to linux_machine1 and linux_machine1 connected to linux_machine2 My Linux server have access only to...
View ArticleLog the output of Expect command
I have made the below expect script and I need to log the output of that script. SOURCE_FILE=`ls -l *.txt --time-style=+%D | grep ${DT} | grep -v '^d' | awk '{print $NF}' ` if [ -n "${SOURCE_FILE}" ]...
View Articleexpect script for getting output for multiple servers
I am trying to get output of IQN from multiple servers. I am getting the below error. Error output spawn /usr/bin/ssh VM2 | /usr/bin/cat /etc/iscsi/initiatorname.iscsi root@VM2's password: bash: -c:...
View Articlepexpect fails to match command if greater than 65 characters
Issue with pexpect, python module. Pexpect fails to do expected behavior if the length of the command is greater than 65.#!/usr/bin/pythonimport pexpectsshCmd='ssh root@15.186.22.105'prompt='[root@user...
View ArticleUse a script for a telnet session
I have a problem with my script. It seems my password is wrong.#!/usr/bin/expectset ip [lindex $argv 0]spawn telnet $ipset timeout 10expect "Login:"send "administrator\r"expect "Password:"send...
View Articleexpect freezes after send
I'm trying to automate a Alpine Linux installation using the following script:expect <<- EOF set timeout -1 spawn setup-disk -e -m sys /dev/sda expect { {WARNING: Erase the above disk(s) and...
View ArticleUsing expect to write a bash script
I am trying to write a bash script using expect. This bash script will reside on a remote server, to be executed at a later date/time. I am using expect to read in a large data file, perform some...
View Articlehow to send special characters in expect script?
I'm trying to send special characters (password) which contains #?!k;|C .The password is dynamic and cannot be hardcoded in the script, so I'm passing it as variable as shown below$ expect...
View Articleadding ansible_python_interpreter to task with expect module fails to get...
I'm writing a task for CentOS7 inventory in which have to go through prompt dialogues, which I think is best candidate for andible's expect module.- name: setup some command become: yes become_user:...
View ArticleHow can I use regex to match the contents by using expect?
I am new to expect for using the regular expression. trying to parse below input stream. How it can be parse with regexp. As CNTXID is incremental."Data" CNTXID = 1 AP = 99 DEF = FALSE CNTXID = 2 AP =...
View ArticleHow do you shut down an expect script in the presence of a complex shell...
I am running zsh inside of tmux with prezto, and a basic expect script is exiting improperly:set timeout -1spawn $env(SHELL)expect -regex ".*"send "echo 'foo'\r"expect -regex ".*foo.*\r"send "^D"expect...
View ArticleExpect works fine,but only in foreground why?
I use this script for update my repo slackware(generate asc,txt,etc)http://slackware.org.uk/people/alien/tools/gen_repos_files.shI have "automated" it with my expect script#!/bin/bashset...
View Articleexpect script terminating early in Dockerfile
I've got an expect script that I need to run in a Dockerfile. However, the script is terminating after all of the input is sent. What's interesting is that docker build is succeeding. Here's my...
View ArticleWaiting until an application is reading (over a TTY)
I'm writing an expect-style program to interact with a command-line application on Linux. Is there any way that my program can know when the application on the other side of the PTY tries to perform a...
View ArticleExpect: print a multi-line string all at once using echo
I have the following section in my code expect code:set command "echo $output"spawn bashexpect "$ "send "$command\r"expect "$command\r\n"Where output is a multi-line string obtained from...
View ArticleWhy does unbuffer -p mangle its input?
$ seq 10 | unbuffer -p od -vtc0000000 1 \n 2 \n 3 \n 4 \n 5 \n 6 \n 7 \n 8 \nWhere did 9 and 10 go?$ printf '\r' | unbuffer -p od -An -w1 -vtc \nWhy was \r changed to \n?$ : | unbuffer -p printf '\n' |...
View ArticleExpect stuck after issuing exit command from application
Normally when in interactive mode, when I type in exit, it displays Disconnected from Virtual Machine 'pick0:LINUX' and then returns to the bash shell prompt.With my expect script, it is stuck on...
View ArticleCorrect way to set PS1 prompt over ssh
I am trying to set the PS1 prompt dynamically on the my remote machine. The idea is that when I will do ssh to the remote machine, I will also send the value which will set as a prompt for that remote...
View Articleexpect script sending password before prompt
I have written a small expect script for automatic ssh to remote server. But sometimes my expect script don't work. Actually it sends password before password prompt. Here is my script#!/usr/bin/expect...
View ArticleShell Script for logging into a ssh server
I tried writing a shell script which can do automatic login into a ssh server using password which is mentioned in the script. I have written the following code:set timeout 30/usr/bin/ssh -p 8484...
View ArticleExiting an Expect Script
I have this expect script, that will log into a host, run a command, return it's contents and exit. What sort of cleanup/proper exiting needs to happen when I've finished running my command? This...
View ArticleAutomate passing JBOSS installer arguments using Expect Command
I have a JBOSS Installer which when run manually it will prompt for input and below is the sample of the execution is as below[sp@sp baseInstaller]$ ./advStart.sh configBuildfile:...
View ArticleHow to use EXPECT in a loop for ssh
Our Linux setup doesn't have keygen configured for passwordless authentication. Hence I am supposed to use only EXPECT for passwordless authentication in a shell script. /usr/bin/expect<<EOF...
View ArticleLooking for assistance in expect
I have a bash script that has expect to login to a remote host and run list of commands. It works as expected. It has a flaw, if the user enters the wrong password, the expect script keeps trying the...
View Articleexpect - repeatably send "\n\r" before a match expect
I need to netcat a U-Boot and perform NAND script and I use below scriptspawn netcat -lup 6666expect "Hit any key to stop autoboot" #autoboot counts down from 3 to 0 and somehow one or two send won't...
View Article'expect' not matching server response string
I'm using a bash script to log into a telnet server and execute a number of commands. It looks like:login_and_run.sh#!/bin/bashunset TELNET_USER_NAME_STRINGunset TELNET_PASSWORD_STRINGunset...
View ArticleExpect Script TCL ending early
I have the following expect script which works for the most part. I have it connecting to a Cisco switch (eventually a couple hundred) and configuring syslog servers. It checks to make sure that...
View ArticleExpect script with Xargs and multiple parameters
I have an expect script that will SSH into a list of routers.The expect script works on a list of routers in a file and is called from a bash script with xargs.Bash : script...
View ArticleHow might I make this expect script consistently work as expected?
I use an interactive wallet spectre-cli of Spectre, a coin similar toKaspa in its design.When I manually want to get the balance of my wallet I need to runspectre-cli and then connect, openfrom within...
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