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2000+ Courses · 15+ Technology Domains
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EX342
Red Hat — Specialist Certification

Linux Diagnostics &

Troubleshooting EX342

From boot issues, file system recovery, and package management to network diagnostics, application debugging, PAM/LDAP authentication, and kernel crashdump collection — master every diagnostic skill in the EX342 exam.

sos report strace perf gdb SystemTap kdump tcpdump journalctl LVM recovery SELinux
Enroll Now Brochure
RHEL Diagnostics Terminal — root@rhel9:~
RHEL 9 Diagnostics | EX342 Lab — root@rhel9 [root@rhel9 ~]# sos report --batch --all-logs Your sosreport has been generated and saved in: /var/tmp/sosreport-rhel9-20240601.tar.xz [root@rhel9 ~]# strace -p 1234 -e trace=open,read,write 2>&1 | head -5 openat(AT_FDCWD, "/etc/myapp.conf", O_RDONLY) = 3 read(3, "# MyApp configuration\n", 4096) = 22 [root@rhel9 ~]# journalctl -b -p err | tail -5 Jun 01 09:12:33 rhel9 kernel: EXT4-fs error (device sdb1): ext4_find_entry: 189 Jun 01 09:13:01 rhel9 systemd[1]: myapp.service: Main process exited, code=exited [root@rhel9 ~]# fsck.ext4 -y /dev/sdb1 e2fsck 1.46.5 (30-Dec-2021) /dev/sdb1: 12/102400 files (0.0% non-contiguous), recovered. [root@rhel9 ~]# tcpdump -i eth0 -n port 80 -w /tmp/http.pcap & tcpdump: listening on eth0, link-type EN10MB, capture size 262144 bytes [root@rhel9 ~]# sealert -a /var/log/audit/audit.log | grep -A5 "AVC" SELinux is preventing httpd from write access on directory /data. Run: setsebool -P httpd_unified 1 RHEL 9 • sos • strace • perf • SystemTap • EX342 Exam Ready • Zetlan Technologies
8
Modules
Full EX342 stack
32+ hrs
Duration
Hands-on labs
Cert Prep
Included
Exam-aligned
24/7
Support
Expert guidance
What You Master

The Complete Linux Diagnostics Skill Set

From general troubleshooting methods and boot issue recovery to file system repair, network diagnostics, application debugging, PAM/LDAP authentication, and kernel crashdump generation.

🔍
Complete Linux Diagnostic Pipeline

Master sos report collection, system monitoring for vital characteristics, centralized logging, boot troubleshooting with kernel modules, file system recovery (ext4, LVM, encrypted), RPM database repair, network diagnostics with tcpdump, application debugging with strace and gdb, SELinux issue resolution, PAM/LDAP/Kerberos authentication fixes, kernel crashdumps, and SystemTap modules.

sosstracegdbperfSystemTapkdumptcpdumpfsckLVMPAM/LDAP
🔧
General Troubleshooting

Collect system info with sos report, monitor vital characteristics, configure centralised log hosts.

🚀
Boot & Startup Issues

Identify and resolve service failures affecting boot, regain root access, troubleshoot boot, manage kernel modules.

8
diagnostic domains covering every Linux troubleshooting skill tested in the EX342 exam.
💾
File System Recovery

Recover corrupted file systems, fix broken LVM configurations, recover data from encrypted volumes, fix iSCSI.

🌐
Network, App & Auth Diagnostics

Verify network connectivity with standard tools, inspect traffic with tcpdump, fix library dependencies and memory leaks, debug applications with strace/gdb, resolve SELinux issues, fix PAM problems, resolve LDAP and Kerberos identity management issues.

strace -p $(pgrep app)
 -e trace=network
perf top -p $(pgrep app)
sealert -a audit.log
authconfig --test
📦
Package Management

Resolve RPM dependency issues, recover a corrupted RPM database, identify and restore changed files.

💥
Kernel Crashdumps

Create kernel crashdumps with kdump, compile and execute SystemTap modules for advanced kernel diagnostics.

Why EX342

The Expert Linux Troubleshooting Certification for Senior Engineers

When systems fail in production, experts who can diagnose and fix issues quickly are invaluable. EX342 certifies you have the deep diagnostic toolkit needed for Linux SRE and senior support roles.

Diagnostic Experts Are Irreplaceable

When production systems fail, the engineer who can diagnose the root cause quickly saves millions. EX342 proves you have those skills.

Performance-Based — No Multiple Choice

EX342 is a live exam on a real RHEL system with real problems to diagnose and fix. Employers value it because it tests genuine troubleshooting ability.

Top Salaries for Senior Linux Engineers

Senior Linux diagnostics and SRE roles command premium salaries at banks, telcos, and data centres across India, the Gulf, and globally.

Complete 8-Domain Coverage

Our curriculum covers every EX342 objective — boot, file systems, packages, networking, application debugging, auth, and kernel crashdumps.

Live RHEL 9 Diagnostic Lab

Practise on real RHEL 9 systems with real diagnostic scenarios — every module includes hands-on tasks aligned to actual exam objectives.

Tools & Technologies You'll Master
sos report
strace
perf
gdb
SystemTap
kdump
tcpdump
Wireshark
journalctl
dmesg
fsck / e2fsck
LVM rescue
PAM
LDAP / sssd
sealert
authconfig
sos report
strace
perf
gdb
SystemTap
kdump
tcpdump
Wireshark
journalctl
dmesg
fsck / e2fsck
LVM rescue
PAM
LDAP / sssd
sealert
authconfig
Curriculum

8-Module EX342 Programme

From general troubleshooting methods and boot recovery to file systems, packages, networking, application debugging, authentication, and kernel crashdumps.

  • Collect system information to aid in troubleshooting
  • Consult documentation resources to aid in troubleshooting
  • Monitor systems for vital characteristics
  • Configure systems to send log messages to a centralized host
  • Identify and resolve service failures affecting boot
  • Regain root control of a system
  • Troubleshoot boot issues
  • Identify hardware and hardware problems
  • Manage kernel modules and their parameters
  • Recover corrupted file systems
  • Recover mis-configured or broken LVM configurations
  • Recover data from encrypted file systems
  • Identify and fix iSCSI issues
  • Resolve package management dependency issues
  • Recover a corrupted RPM database
  • Identify and restore changed files
  • Use standard tools to verify network connectivity
  • Identify and fix network connectivity issues
  • Inspect network traffic to aid troubleshooting
  • Identify library dependencies for third-party software
  • Identify if an application suffers from memory leaks
  • Use standard tools to debug an application
  • Identify and fix issues related to SELinux
  • Identify and fix pluggable authentication module (PAM) issues
  • Identify and fix LDAP and Kerberos identity management issues
  • Create kernel crashdumps
  • Compile and execute SystemTap modules
Course Snapshot
8 Modules
Full EX342 objectives
32+ Hours
Total learning time
Cert Prep
Exam-aligned content
Tech Support
Call / WhatsApp
Mon–Fri
9 AM – 6 PM
Enroll Now Download Brochure
Have Questions?

Chat with our Linux diagnostics certified trainers.

WhatsApp Us
Pricing & Packages

Get a Custom Quotation

Flexible pricing for live and blended training modes — we reply within 24 hours.

Career Outcomes

EX342 Careers in Linux Support & SRE

Senior Linux diagnostics skills are valued at banks, telcos, government agencies, and IT service firms that depend on RHEL infrastructure for mission-critical workloads.

Red Hat
Support
IBM
Linux SRE
HCL
Infra Ops
TCS
Linux L3
Linux L3 Support Engineer
Diagnose and resolve complex RHEL system issues — boot, storage, networking, applications, and authentication.
₹8–18 LPA
Site Reliability Engineer
Maintain RHEL infrastructure reliability using diagnostic tools and systematic troubleshooting frameworks.
₹12–28 LPA
Security & Compliance Engineer
Diagnose SELinux, PAM, and authentication issues in hardened enterprise RHEL environments.
₹10–24 LPA
Infrastructure Engineer
Maintain high-availability RHEL infrastructure, resolve performance degradation and system failures.
₹10–22 LPA
Linux Platform Architect
Design resilient RHEL platforms with proven diagnostic and recovery procedures for enterprise clients.
₹16–40 LPA
8
Modules
32+
Hours of Training
₹8–40L
Salary Range
EX342
RH Certified
New Batch Starting Soon — Limited Seats

Ready to Master Linux Diagnostics?

Join senior Linux engineers building expert-level diagnostic careers on Red Hat Enterprise Linux — the platform where deep troubleshooting skills command premium compensation.

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