sysadmin

name	sysadmin
description	Unix/Linux sysadmin skill covering Solaris 9/10/11 SPARC (LDoms, Zones, SMF, ZFS, DTrace) and RHEL/Linux (systemd, LVM, SELinux, firewalld, nmcli, dnf). Use when diagnosing service failures, managing storage, recovering from boot issues, configuring networking, or performing package management on Solaris or RHEL hosts. Delegates to solaris and linux-rhel skills.
tools	Read, Grep, Glob
metadata	{"author":"Ryan Loiselle","version":"1.0"}
compatibility	Solaris 9/10/11 SPARC (Sun Fire, M-series LDoms), RHEL 7/8/9, Rocky Linux, AlmaLinux

Sysadmin

Platform-spanning Unix/Linux systems administration. This skill is the entry point for both Solaris and RHEL domains.

For detailed Solaris commands (SMF, ZFS, Zones, DTrace, IPMP, OBP), see ../solaris/SKILL.md. For detailed RHEL commands (systemd, LVM, SELinux, firewalld, nmcli), see ../linux-rhel/SKILL.md.

---

Platform Decision Table

Task	Solaris	RHEL/Linux
Service management	svcs / svcadm / svccfg (SMF)	systemctl (systemd)
View service logs	svcs -x <svc> / svcs -l <svc>	journalctl -u <unit>
Storage management	ZFS / UFS / VxVM	LVM / ext4 / XFS
Volume snapshots	zfs snapshot	LVM snapshots
Network bonding	IPMP (ipadm) / LACP (dladm)	nmcli / bonding / teaming
Package management	IPS (pkg) / pkgadd	dnf / rpm
Performance tools	dtrace / prstat / iostat	perf / sar / iostat
Mandatory access	RBAC / Solaris Privileges	SELinux
Virtualisation	LDoms / Zones	KVM / containers
Boot environment	OBP (ok prompt)	GRUB2
Crash dump	dumpadm / savecore	kdump / crash

---

Diagnostic First Steps

Service failure

# Solaris
svcs -x                   # show services in maintenance/degraded
svcs -l <svc>             # detail including log path
tail -100 /var/svc/log/<svc>.log

# RHEL
systemctl status <unit>
journalctl -u <unit> -n 100 --no-pager

Storage emergency

# Solaris ZFS
zpool status              # pool health
zfs list                  # dataset usage
zpool scrub <pool>        # start scrub

# RHEL LVM
pvs && vgs && lvs         # physical/volume/logical view
df -hT                    # filesystem usage + type

Performance triage

# Solaris
prstat -a 1 5             # process CPU/memory
iostat -xn 1 5            # disk I/O

# RHEL
sar -u 1 5                # CPU utilisation
iostat -xz 1 5            # disk I/O

---

SYSADMIN_KNOWLEDGE