About r/sysadmin
In its own words:
A reddit dedicated to the profession of Computer System Administration.
Community guide
r/sysadmin (#799, about 1.3 million subscribers) is oriented around: A reddit dedicated to the profession of Computer System Administration. Recent activity samples show 54 posts/day in recent samples (~100% text). Public rules we collected include: Account Age; Professionalism; Advertising; Wrong Community; Low Quality. Directory metadata files it under “Technology”.
What belongs here
Stay inside the room’s stated scope rather than adjacent off-topic dumps. Self-promotion and ads are limited—read those rules before linking your own work. Match posts to: Account Age; Professionalism; Advertising; Wrong Community.
How it differs from lookalikes
Prefer this room when your post matches its description and rules—not merely a larger sibling community.
Practical pointers
Read the live sidebar/rules before posting; collected snapshots can lag. Common flairs in samples include: Question, General Discussion, Rant, Career / Job Related.
SubMouse Editorial
The community was created on Oct 22, 2008, which makes it 18 years old. Since Oct 26, 2026, it has gained 2,815 subscribers (+0.21%). It sits just behind r/DidntKnowIWantedThat (#798) and ahead of r/CryptoTechnology (#800) in our ranking.
What sets r/sysadmin apart
r/sysadmin is far more text-driven than most big subreddits: 100% of its recent posts are text posts, against a median of 35% across the Top 100. For its size it is unusually busy: about 40.7 new posts a day per million members, more than 83% of the Top 100. It is also one of the faster-growing big communities: its 1.04% gain since Sep 19, 2026 beats 95% of the Top 100. Its rhythm is strongly tied to time zones: the busiest hour (19:00 UTC) sees about 10.3× as many posts as the quietest (04:00 UTC).
Subscriber growth
Between Sep 19, 2026 and Nov 2, 2026, r/sysadmin climbed from 1,323,839 to 1,337,617 subscribers (+13.8K, +1.04%). That is about 313 new members per day. The chart uses our weekly snapshots (9 so far), so it gets longer every week.
What r/sysadmin talks about
Looking at the titles of 348 recent posts (Oct 29–Nov 5), the words that come up most are “windows”, “microsoft”, “company”, “server” and “small”. Other frequent themes are email, looking, management, handle, servers and admin. Recurring phrases include “reliable onsite”, “support ontechcare”, “windows server” and “google workspace”. By format, 100% are text posts.
Popular post flairs: Question (65), General Discussion (59), Rant (11), Career / Job Related (10), Advertising (8), Microsoft (7).
Activity and best time to post
r/sysadmin gets about 55 new posts a day. The public archive holds 539,152 posts and 11,156,457 comments in total, about 20.7 comments per post. Last week the busiest day was Wednesday (81 posts) and the quietest was Sunday (24). Posting peaks around 19:00 UTC and is lowest around 04:00 UTC.
Rules of r/sysadmin
The moderators of r/sysadmin list 5 rules. In short:
- Account Age
- Professionalism
- Advertising
- Wrong Community
- Low Quality
How to join
Open reddit.com/r/sysadmin and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How big is r/sysadmin?
r/sysadmin has 1,337,617 subscribers (Nov 2, 2026), which makes it the #799 safe-for-work subreddit in the SubMouse ranking. It added 13,778 members between Sep 19, 2026 and Nov 2, 2026.
How old is r/sysadmin?
r/sysadmin was created on Oct 22, 2008, so it has been around for 18 years. The oldest post in the public archive is from Mar 8, 2009.
How active is r/sysadmin?
Very active: r/sysadmin gets about 55 new posts a day (average of the last four weeks). Over its lifetime the archive counts 539,152 posts and 11,156,457 comments. In a sample of 348 recent posts we counted 314 different authors.
When is r/sysadmin most active?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Wednesday and the quietest Sunday, and most posts arrive around 19:00 UTC, with the fewest around 04:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What is r/sysadmin about?
The community describes itself as: “A reddit dedicated to the profession of Computer System Administration.” Recent post titles often mention windows, microsoft, company, server and small. Most posts are text posts (100%).
Is r/sysadmin safe for work?
Yes. Reddit does not mark r/sysadmin as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
How do I post on r/sysadmin?
Join the community on Reddit first, then use “Create post”. r/sysadmin accepts text posts only. It has 5 posted rules, starting with: “Account Age”; “Professionalism”; “Advertising”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
Which communities are like r/sysadmin?
Communities with similar topics include r/Simulated (1.4M), r/compsci (4M), r/nasa (5.9M), r/wallpaper (2M) and r/cscareerquestions (2.4M).
Stats from public data (data updated Nov 2, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/sysadmin.