DE

↑ ↓ select, Enter open, Esc close

Flush Memcached completely (flush_all)

cautionRedis and Memcacheddebian, ubuntu

Caution: This command changes the system. Understand what it does before you run it.

Adjust the values, the command updates live
user@server
printf 'flush_all\nquit\n' | nc 127.0.0.1 11211

Sends flush_all to Memcached, which confirms with OK. All stored entries are then treated as expired, and the occupied memory is reused on the next write. This affects every application using this Memcached instance.

Note: If PHP sessions are stored in Memcached (session.save_handler = memcached), all visitors are logged out afterwards.

Also searched as

  • clear memcached cache
  • flush memcached without restart
  • run flush_all memcached

Related one-liners

All in Redis and Memcached

Flush a single Redis database (FLUSHDB)

$redis-cli -n 0 FLUSHDB
destructiveRedis and Memcached

Flush all Redis databases (FLUSHALL)

$redis-cli FLUSHALL
destructiveRedis and Memcached

Query Memcached statistics with netcat

$printf 'stats\nquit\n' | nc 127.0.0.1 11211 | grep -E 'STAT (curr_items|bytes|limit_maxbytes|get_hits|get_misses|evictions|curr_connections) '
harmlessRedis and Memcached

Check the Redis Object Cache status in WordPress

$wp redis status --path=/var/www/vhosts/example.com/httpdocs
harmlessRedis and Memcached

Check if LiteSpeed Cache serves a page from cache

$curl -s -o /dev/null -D - https://example.com/ | grep -iE "^(server|x-litespeed-cache[a-z-]*):"
harmlessLiteSpeed

Check the browser caching headers of a file

$curl -sI https://example.com/wp-includes/css/dist/block-library/style.min.css | grep -iE "^(cache-control|expires|etag|last-modified|age):"
harmlessnginx

Read first, then run.

The commands on myline.de act directly on servers, files and databases. A wrong path or placeholder can delete data irreversibly or make a server unreachable.

  • All commands are provided without warranty and are not tested on every system.
  • Understand what a command does before running it, and check every placeholder.
  • Make a backup first and, if possible, try it on a test system.
  • You run commands at your own risk. Liability for damages is excluded to the extent permitted by law.