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Bash Basics

Nov 19, 2022CodeCatch
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watchLogins.sh

Sep 30, 2021LeifMessinger

0 likes • 8 views

touch /tmp/login1.txt /tmp/login2.txt
while [ true ]
do
who | gawk '{ print $1 }' > /tmp/login2.txt
comm -13 /tmp/login1.txt /tmp/login2.txt
#Just a bit easier to read
#diff /tmp/login1.txt /tmp/login2.txt
cat /tmp/login2.txt > /tmp/login1.txt
sleep 1
done

credit.sh

Oct 26, 2021LeifMessinger

0 likes • 2 views

#!/bin/bash
#Leif Messinger lsm0147
#credit.sh FILES
cred="Leif Messinger lsm0147"
for bruh; do
if [[ $bruh =~ \.cpp|\.c|\.java|\.js ]]; then
comment="//$cred"
else
#Basically everything else gets a pound sign comment
#Pound signs are standard across linux. bash, sed, gawk, python etc
#Speaking of which, I need to escape it because of that.
comment="\#$cred"
fi
if [ -s $bruh ]; then
#If the file has a shebang
if egrep -q '^#!/' $bruh; then
sed -i "/^\#!\//a$comment" $bruh
else
sed -i "1i$comment" $bruh
fi
else
echo "$comment" > $bruh
fi
done

codecatch.sh

Nov 14, 2021LeifMessinger

0 likes • 0 views

#!/bin/bash
#Takes all the c and h files in the current directory and prints them
#Yup, it's that easy
for file in *.h *.hpp *.c *.cpp; do
#If it exists
if [ -f "$file" ]; then
echo "//===============$file==============="
cat $file
fi
done

Search file with word list fast

Feb 22, 2022LeifMessinger

0 likes • 1 view

#Leif Messinger
#For when you want to search a lot of words in a file fast
#Arg 1 is the argument the list of words you want to search
#Arg 2 is the file you want to search
#-z means that it looks at the file as a whole, just treating newlines a characters.
#-r is regex. Needed for $, even tho the documentation says you don't need it. They are liars.
#First command replaces all . with \. and all - with \-
#Second command takes all newlines and replaces them with )|(
#Third command takes the trailing |( and deletes it
#Forth command puts a /( at the start
#Fith command puts /!d at the end. This tells it to not delete any lines that match the pattern.
#The second sed takes the output of the first sed as a command that searches any of the combined words
#-f - takes a command from the input
sed -z -r -e 's/\./\\\./g ; s/\-/\\\-/g' -e 's/\n/\)\|\(/g' -e 's/\|\($//' -e 'i/\(' -e 'a/!d' $1 | sed -r -f - $2

abuseipdb config

Nov 18, 2022AustinLeath

0 likes • 9 views

#for ssh abuse attempts
action = %(action_)s
%(action_abuseipdb)s[abuseipdb_apikey="", abuseipdb_category="18,22"]
actionban = curl --fail --ciphers ecdhe_ecdsa_aes_256_sha --data 'key=<abuseipdb_apikey>' --data-urlencode 'comment=<matches>' --data 'ip=<ip>' --data 'category=<abuseipdb_category>' "https://www.abuseipdb.com/report/json"

makeHeaderTags.sh

Feb 5, 2024LeifMessinger

0 likes • 10 views

#!/bin/bash
# Recursively find all .svelte files in the current directory and its subdirectories
find . -type f -name "*.svelte" -o -name "*.html" -o -name "*.htm" | while read file; do
# Replace all h1 tags with the specified format
sed -i 's/<h1>\(.*\)<\/h1>/<h1 id="\1">\1<\/h1>/g' "$file"
# Replace all h2 tags with the specified format
sed -i 's/<h2>\(.*\)<\/h2>/<h2 id="\1">\1<\/h2>/g' "$file"
# Remove whitespace from the id attribute value
for i in {0..10} ; do
sed -i 's/\(id="[^"]*\)\W\([^"]*"\)/\1\2/g' "$file"
done
done