SSH - Using grep with special chars - ssh

I'm trying to search some string on some files but I didn't find the good combination.
I want to use this command but I have an error in my syntax
grep -r -H "<?php $GLOBALS[" /var/www/vhosts/
I want to search (via SSH) the string <?php $GLOBALS[ on the files under /var/www/vhosts


Use this:
ssh user#host "grep -r -H '<?php \$GLOBALS\[' /var/www/vhosts/"

Related

Passing gitlab variables in sshpass script

Is there a way to add gitlab variables to the command ?
eg: variables: ARTIFACTORY_ADDRESS: "a.com"
script:
sshpass -p "password" ssh -o "StrictHostKeyChecking=no" user#SERVER 'echo $ARTIFACTORY_ADDRESS'
Currently its not taking the value from the variable and printing $ARTIFACTORY_ADDRESS in the console. I want the value to be printed in the console

Check first if using double-quotes would help enabling variable substitution:
sshpass -p "password" ssh -o "StrictHostKeyChecking=no" user#SERVER \
"echo $ARTIFACTORY_ADDRESS"
^^^ ^^^

How to escape ANSI format on remote SSH command?

I wanted to change the title of the window using the command as described here over SSH, however I kept get getting the error:
033]sh: Hello: command not found
Connection to host closed.
with the command:
ssh.exe user#host -t 'echo -en "\033];Hello World\007"'
No matter how I try to escape them, it seems to somehow return error. Tried:
ssh.exe user#host -t 'echo -en "\\033];Hello World\\007"'
ssh.exe user#host -t "echo -en \'\\033];Hello World\\007\'"
Any idea how to fix this?

How to get all tags from github api

I usually get the releases/tags from github API with below command
$ repo="helm/helm"
$ curl -sL https://api.github.com/repos/${repo}/tags |jq -r ".[].name"
v3.2.0-rc.1
v3.2.0
v3.1.3
v3.1.2
v3.1.1
v3.1.0-rc.3
v3.1.0-rc.2
v3.1.0-rc.1
v3.1.0
v3.0.3
v3.0.2
v3.0.1
v3.0.0-rc.4
v3.0.0-rc.3
v3.0.0-rc.2
v3.0.0-rc.1
v3.0.0-beta.5
v3.0.0-beta.4
v3.0.0-beta.3
v3.0.0-beta.2
v3.0.0-beta.1
v3.0.0-alpha.2
v3.0.0-alpha.1
v3.0.0
v2.16.6
v2.16.5
v2.16.4
v2.16.3
v2.16.2
v2.16.1
But in fact, it doesn't list all releases, what should I do?
For example, I can't get release before v2.16.1 as below link
https://github.com/helm/helm/tags?after=v2.16.1
I try to reference the same way to add ?after=v2.16.1 in curl api
command, but no help
curl -sL https://api.github.com/repos/${repo}/tags?after=v2.16.1 |jq -r ".[].name"
I got same output.
Reference: https://developer.github.com/v3/git/tags/

This could be because of pagination
See this script as an example of detecting pages, and adding the required ?page=x to access to all the data from a GitHub API call.
Relevant extract:
# single page result-s (no pagination), have no Link: section, the grep result is empty
last_page=`curl -s -I "https://api.github.com${GITHUB_API_REST}" -H "${GITHUB_API_HEADER_ACCEPT}" -H "Authorization: token $GITHUB_TOKEN" | grep '^Link:' | sed -e 's/^Link:.*page=//g' -e 's/>.*$//g'`
# does this result use pagination?
if [ -z "$last_page" ]; then
# no - this result has only one page
rest_call "https://api.github.com${GITHUB_API_REST}"
else
# yes - this result is on multiple pages
for p in `seq 1 $last_page`; do
rest_call "https://api.github.com${GITHUB_API_REST}?page=$p"
done
fi

With help from #VonC, I got the result with extra query string ?page=2, if I'd like to query older releases and so on.
curl -sL https://api.github.com/repos/${repo}/tags?page=2 |jq -r ".[].name"
I can easily get the last page now.
$ GITHUB_API_REST="/repos/helm/helm/tags"
$ GITHUB_API_HEADER_ACCEPT="Accept: application/vnd.github.v3+json"
$ GITHUB_TOKEN=xxxxxxxx
$ last_page=`curl -s -I "https://api.github.com${GITHUB_API_REST}" -H "${GITHUB_API_HEADER_ACCEPT}" -H "Authorization: token $GITHUB_TOKEN" | grep '^Link:' | sed -e 's/^Link:.*page=//g' -e 's/>.*$//g'`
$ echo $last_page
4

remote ssh execution : Single Quotes inside double quotes

All,
I have not been able to escape single quotes while writing a file to a remote node.
ssh -i demo.pem -t ec2-user#10.10.10.10 'echo '\''{"watches": [{"type": "key","key": "test","handler": "neon -e 'sudo /opt/watch_handler.sh'"}]}'\''| sudo tee /etc/key.json'
The output I get is as follows.
{"watches": [{"type": "key","key": "test","handler": "neon -e sudo /opt/watch_handler.sh"}]}
I would like the output to have single quotes around 'sudo /opt/watch_handler.sh'
{"watches": [{"type": "key","key": "test","handler": "neon -e 'sudo /opt/watch_handler.sh'"}]}
'\' is not working.
Could you please help.
Thanks,

Getting multiple levels of quoting correct is troublesome and error-prone. Consider alternative solutions, such as:
cat <<EOF | ssh -i demo.pem -t ec2-user#10.10.10.10 sudo tee /etc/key.json
{"watches": [{"type": "key","key": "test","handler": "neon -e 'sudo /opt/watch_handler.sh'"}]}
EOF
I like using cat because it does not require any escaping to work. However, you can also generate the string locally using echo instead of cat as long as you escape the double quotes in your JSON expression:
echo "{\"watches\": [{\"type\": \"key\",\"key\": \"test\",\"handler\": \"neon -e 'sudo /opt/watch_handler.sh'\"}]}" | sudo tee /etc/key.json

escape character with ssh

I'm trying to write several commands trought ssh connection bue I got problem with escape characters. Below an example of what I'd like to do:
/usr/bin/ssh mrtg#172.20.29.40 echo -e "ciao\nprova"
I got this result:
ciaonprova
instead of:
ciao
prova
if I use -e option for ssh:
/usr/bin/ssh -e mrtg#172.20.29.40 echo -e 'ciao\nprova'
I receive this error:
Bad escape character 'mrtg#172.20.29.40'.
Can someone give me a suggestion to let remote server interpret escape characters?

The -e option has nothing to do with your command (these are SSH escape characters, not shell).
You can just put your command in quotes:
/usr/bin/ssh mrtg#172.20.29.40 'echo -e "ciao\nprova"'