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@angelikatyborska
angelikatyborska / script.sh
Created March 1, 2019 10:18
Append to a 644 root owned file
# as sudoer, non-root:
echo 'foo' | sudo tee -a /etc/hosts
# or
sudo bash -c "echo 'foo' >> /etc/hosts"
# this does NOT work
sudo echo 'foo' >> /etc/hosts
@angelikatyborska
angelikatyborska / gist:275c053846cf4d17d583efa26c87d493
Created May 7, 2019 11:51 — forked from CristinaSolana/gist:1885435
Keeping a fork up to date

1. Clone your fork:

git clone git@github.com:YOUR-USERNAME/YOUR-FORKED-REPO.git

2. Add remote from original repository in your forked repository:

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream
@angelikatyborska
angelikatyborska / script.sh
Created May 20, 2019 08:17
Copy a gpg key from pubring.kbx to pubring.gpg
gpg --keyring pubring.kbx --armor --export somebody@example.com > some-key
gpg --no-default-keyring --keyring pubring.gpg --import < some-key
@angelikatyborska
angelikatyborska / fd.sh
Created June 28, 2019 05:23
file descriptors commands
# check number of used FDs per process
ls /proc/$pid/fd | wc -l
# check number of used FDs system-wide
# returns: 1. allocated, 2. allocated but free (usually 0), 3. system max
sysctl fs.file-nr
# check FD per user limit
ulimit -a
@angelikatyborska
angelikatyborska / sock.rb
Created July 2, 2019 15:19
HTTP(S) request via socket in Ruby
# HTTP
sock = TCPSocket.new('example.com', 80);
sock.write("GET /path HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n");
puts sock.read;
sock.close;
# HTTPS
sock = TCPSocket.new('example.com', 443)
sslsock = OpenSSL::SSL::SSLSocket.new(sock)
sslsock.connect
@angelikatyborska
angelikatyborska / index.html
Last active March 11, 2025 20:45
Providing custom error messages for built-in HTML5 form validation
<!DOCTYPE html>
<html lang="en">
<head>
<title>Form Validation</title>
<style>
body { padding: 10px; }
</style>
</head>
<body>
<form>
@angelikatyborska
angelikatyborska / post-checkout
Created May 14, 2020 06:48
post-checkout git hook to stash deps and _build
#!/bin/sh
# Set this to a list of space-separated paths to files/directories,
# which will be stashed away, when the current branch is changed
ARTIFACT_PATHS="deps _build"
# Set this to a directory where you would like the build artifacts of
# other branches to be stashed
ARTIFACT_STASH_PATH=".artifacts-stash"
PREVIOUS_HEAD="$1"
CURRENT_HEAD="$2"
IS_BRANCH_CHECKOUT="$3"
@angelikatyborska
angelikatyborska / gist:db66261f876d4047fba35bdcf244d790
Created June 2, 2020 13:46
Verify emails from a list with swaks
for E in `cat ~/some/file/with/email/addresses`
do
swaks --to $E --quit-after RCPT --hide-all
[ $? -ne 0 ] && echo $E
done
@angelikatyborska
angelikatyborska / index.html
Last active August 6, 2020 15:25
Custom validation messages - 3 inputs
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Form Validation</title>
<style>
body { padding: 10px; }
</style>
</head>
<body>
@angelikatyborska
angelikatyborska / angelika.zsh-theme
Created August 8, 2020 14:28
# requires the git-prompt zsh plugin, which in turn requires python2
PROMPT="%{$fg[blue]%}%n%{$reset_color%} in "
PROMPT+='%{$fg[cyan]%}%~%{$reset_color%} $(git_super_status)'
PROMPT+='
%(?:%{$fg_bold[green]%}$ :%{$fg_bold[red]%}$ )%{$reset_color%}'
RPROMPT=''
ZSH_THEME_GIT_PROMPT_CHANGED="%{$fg[red]%}%{∙%G%}"
ZSH_THEME_GIT_PROMPT_CONFLICTS="%{$fg[red]%}%{×%G%}"