Sharing shell scripts to fix bash vulnerabilities_javascript skills
I searched for information on the Internet and found a shell script to fix bash vulnerabilities written by a master. I thought it was very good, so I dragged it to my blog to share it with everyone.
Script content:
#/bin/bash
#Author Alex Fang. Updates may apply soon.
clear
echo "Press anykey to continue..." $anykey ; read anykey
echo "BBBBBBBBBBBAAAAAAAAAAAAAAAAASSSSSSSSSSSSSSSSHHHHHHHHHHHHHHHHHH!"
echo "ShellShockFixer v0.1 by Alex Fang. Liscence: GNU GPLv2"
echo "############################################## ######"
echo "Select on option:"
echo "1) CentOS"
echo "2) Debian Wheezy"
echo "3) Debian Squeeze x64(Provided by Aliyun)"
echo "4) Debian Squeeze x32(Provided by Aliyun)"
echo "5) Ubuntu"
echo "6) OpenSuSE x64(Beta, provided by Aliyun)"
echo "7) OpenSuSE x32(Beta Aliyun)"
echo "8) Aliyun Linux x64"
echo "9) Aliyun Linux x32"
echo "0) iptables way"
echo "11) Temporarily disable bash through chmod"
echo "############################################## ######"
read x
if test $x -eq 1; then
clear
echo "Fixing..."
yum clean all
yum makecache
yum update bash
echo "Finished!"
elif test $x -eq 2; then
clear
echo "Fixing for Debian Wheezy..."
apt-get update
apt-get -y install --only-upgrade bash
echo "Finished!"
elif test $x -eq 3; then
echo "Fixing for Debian Squeeze x64..."
wget http://mirrors.aliyun.com/debian/pool/main/b/bash/bash_4.1-3 deb6u2_amd64.deb && dpkg -i bash_4.1-3 deb6u2_amd64.deb
echo "Finished!"
elif test $x -eq 4; then
echo "Fixing for Debian Squeeze x32..."
wget http://mirrors.aliyun.com/debian/pool/main/b/bash/bash_4.1-3 deb6u2_i386.deb && dpkg -i bash_4.1-3 deb6u2_i386.deb
echo "Finished!"
elif test $x -eq 5; then
echo "Fixing for Ubuntu..."
apt-get update
apt-get -y install --only-upgrade bash
echo "Finished!"
elif test $x -eq 6; then
echo "Fixing for OpenSuSE x64"
wget http://mirrors.aliyun.com/fix_stuff/bash-4.2-68.4.1.x86_64.rpm && rpm -Uvh bash-4.2-68.4.1.x86_64.rpm
echo "Finished!"
elif test $x -eq 7; then
echo "Fixing for OpenSuSE x32"
wget http://mirrors.aliyun.com/fix_stuff/bash-4.2-68.4.1.i586.rpm && rpm -Uvh bash-4.2-68.4.1.i586.rpm
echo "Finished!"
elif test $x -eq 8; then
echo "Fixing for Aliyun Linux x64..."
wget http://mirrors.aliyun.com/centos/5/updates/x86_64/RPMS/bash-3.2-33.el5_10.4.x86_64.rpm && rpm -Uvh bash-3.2-33.el5_10.4.x86_64. rpm
echo "Finished!"
elif test $x -eq 9; then
echo "Fixing for Aliyun Linux x32..."
wget http://mirrors.aliyun.com/centos/5/updates/i386/RPMS/bash-3.2-33.el5_10.4.i386.rpm && rpm -Uvh bash-3.2-33.el5_10.4.i386. rpm
elif test $x -eq 0; then
echo "Deploying iptables rules..."
iptables --append INPUT -m string --algo kmp --hex-string '|28 29 20 7B|' --jump DROP
iptables using -m string --hex-string '|28 29 20 7B|'
echo "Finishing..."
elif test $x -eq 11; then
echo "Chmod way configuring..."
chmod o-x bash
echo "Finishing..."
else
echo "Invalid Operation."
exit
fi

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Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

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