Ssh search for text in files output file

#Ssh search for text in files output file how to

Jan 2 11:05:01 TecMint CRON: pam_unix(cron:session): session closed for user root

Jan 2 11:05:01 TecMint CRON: pam_unix(cron:session): session opened for user root by (uid=0) Jan 2 10:55:01 TecMint CRON: pam_unix(cron:session): session closed for user root Jan 2 10:55:01 TecMint CRON: pam_unix(cron:session): session opened for user root by (uid=0)

Jan 2 10:51:39 TecMint sudo: pam_unix(sudo:session): session closed for user root Jan 2 10:51:34 TecMint sudo: pam_unix(sudo:session): session opened for user root by (uid=0) Jan 2 10:51:34 TecMint sudo: tecmint : TTY=unknown PWD=/home/tecmint USER=root COMMAND=/usr/lib/linuxmint/mintUpdate/checkAPT.py Jan 2 10:45:01 TecMint CRON: pam_unix(cron:session): session closed for user root Jan 2 10:45:01 TecMint CRON: pam_unix(cron:session): session opened for user root by (uid=0) You can use the -n num flag to specify the number of lines to be displayed: ~ $ head /var/log/auth.log Head is used to display the first parts of a file, it outputs the first 10 lines by default. You can read more about WhatвЂ™s Difference Between Grep, Egrep and Fgrep in Linux?. Note: The main program is grep, the variations are simply the same as using specific grep options as below (and they are still being used for backward compatibility): $ egrep = grep -EД«elow are some basic grep commands: ~ $ grep 'aaronkilik' /etc/passwdДЄaronkilik:x:1001:1001::/home/aaronkilik: ~ $ cat /etc/passwd | grep 'aronkilik'ДЄaronkilik:x:1001:1001::/home/aaronkilik: They read lines from a file or standard input, and print all matching lines by default to standard output. These filters output lines matching a given pattern. The sed man page has added control options and instructions: $ man sed

15 Useful вЂsedвЂ™ Command Tips and Tricks for Daily Linux System Administration Tasks.

#Ssh search for text in files output file how to

How to use GNU вЂsedвЂ™ Command to Create, Edit, and Manipulate files in Linux.

WeвЂ™ve already written a two useful articles on sed, that you can go through it here: Vagrant machines forward the ssh port 22В into various ports like 2200В and 2222В that is what am using in this screenshot if you are wondering.Sed is a powerful stream editor for filtering and transforming text. You can see the task1 is executed successfully so the task2 is not making any further changes and we are able to SSH in without being prompted for the password. Key: '' Execution Result of this Ansible lookup playbook name: 'Copy the public Key using Lookup' # ANSIBLE FILE LOOKUP PLUGIN HELPS TO READ THE FILE CONTENTS WITHIN THE ANSIBLE PLAYBOOK # IN TASK2: WE ARE READING THE PUBLIC KEY FROM THE FILE DIRECTLY USING LOOKUP Key: 'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCmdlM0QV6HxZQ7iqXiboefzMHR/cKX+qlTezRiExW6jmwNaD1a9F3KlMaoi4eTKGtPbM9eTygcBjJOGZhEjZITuNat7teK/evvbiszrT3ORUvotnv8yjVC02CGFsK6fPs10J0rgITPdsnd+oq9WcJ/2rM5wHJPoSfhUzhgDB7mdOIeVM+mG89j+OPV377HRTењњ5O9Ja9nX9J5ElHXFWu2CTLMjgYxZ16FLpIdlrL4I12mCucZ8jGaZp8frarwyilHsuUt2hQFi3XEmT3ACKiAtE0kBhclr2gtc2wNoVJVoWB ' name: 'Copy the public Key Using the Key directly within Playbook' # IN TASK1: WE ARE KEEPING THE PUBLIC KEY AS A TEXT IN PLAYBOOK # BOTH TASKS ARE EXACLY DOING THE SAME JOB In the second task, the same job is accomplished more efficiently with the help of Ansible File Lookup.ДЄs you could have understood by now Ansible file lookup helps to read the file content.

The First task, you could see that the public Key has been passed as a bare text to the key parameter. In the following example, you could notice that the task1В and task2 are doing the exact same job of copying the public key from local and adding to the authorized_keyВ on the remote server to enable SSH Key based authentication. with Ansible file lookup you can read a file and assign to a variable for further processing. Simply put, Ansible file lookup helps to read the file content and load or display within the Ansible playbook. However, we are going to see only the file lookup in this article. There are various Ansible Lookup plugins available and we have shortlisted some of the widely used and popular ansible lookup plugins or simply ansible lookups This can include reading the filesystem in addition to contacting external datastores and services. That where the ansible lookup plugins are useful.ДЄnsible Lookup plugins allow Ansible to access data from outside sources. When it comes to automation, we handle different types of data and files such as csv, txtВ and sometimes we might even need to read data from a key-value store such as etcdВ or redis

Execution Result of this Ansible lookup playbook.