Before proceeding with installation, verify whether zlib is already present on your system. #### Method 1: Verify zlib Version

Execute this command: ``` zlib-flate -version

If `zlib` is installed, the output will resemble: ```
zlib-flate version 1.2.11

Otherwise, you'll receive a error like command not found. > Note: zlib-flate is part of the qpdf package and may not be pre-installed on all systems, making this check unreliable in some cases. #### Method 2: Locate Header and Library Files

The development componants of zlib typically consist of header files (zlib.h) and library files (libz.so or libz.a). You can confirm their presence with these commands: - Check for header file:``` ls /usr/include/zlib.h

```

If the file exists, the development headers are installed.

• Check for library files:``` ls /usr/lib*/libz.so*

  
  or ```
  ls /usr/local/lib*/libz.so*
  
  

  A match such as libz.so indicates the libraries are installed.

Install zlib

If zlib is missing, proceed with installation based on your system's package manager. #### 1. Installing on Debian/Ubuntu Systems

• Install runtime library:``` sudo apt update sudo apt install zlib1g

  
  This installs the shared library (`libz.so`) used at runtime.
  

• Install development files (headers and static library):``` sudo apt install zlib1g-dev

  
  This includes the header file (`zlib.h`) and static library (`libz.a`) required for compiling programs that depend on `zlib`.
  
  

2. Installing on CentOS/RHEL/Fedora Systems

• Install runtime library:``` sudo yum install zlib

  
  or for newer versions: ```
  sudo dnf install zlib
  
  

  Installs the shared library (libz.so).

• Install development files:``` sudo yum install zlib-devel

  
  or ```
  sudo dnf install zlib-devel
  
  

  Installs the header and static library needed for compilation.

3. Installing on Arch Linux

• Enstall runtime library:``` sudo pacman -S zlib

• Install development files:``` sudo pacman -S zlib-devel

  
  In Arch, the development components are usually bundled with the base `zlib` package. Confirm installation by checking: ```
  /usr/include/zlib.h
  /usr/lib/libz.so
  
  

4. Installing on openSUSE

• Install runtime library:``` sudo zypper install zlib

• Install development files:``` sudo zypper install zlib-devel

  
  Ensures the necessary header and library files for building dependent software are available.