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# docker update
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Update configuration of one or more containers
### Aliases
`docker container update`, `docker update`
### Options
| Name | Type | Default | Description |
|:-----------------------|:----------|:--------|:-----------------------------------------------------------------------------|
| `--blkio-weight` | `uint16` | `0` | Block IO (relative weight), between 10 and 1000, or 0 to disable (default 0) |
| `--cpu-period` | `int64` | `0` | Limit CPU CFS (Completely Fair Scheduler) period |
| `--cpu-quota` | `int64` | `0` | Limit CPU CFS (Completely Fair Scheduler) quota |
| `--cpu-rt-period` | `int64` | `0` | Limit the CPU real-time period in microseconds |
| `--cpu-rt-runtime` | `int64` | `0` | Limit the CPU real-time runtime in microseconds |
| `-c`, `--cpu-shares` | `int64` | `0` | CPU shares (relative weight) |
| `--cpus` | `decimal` | | Number of CPUs |
| `--cpuset-cpus` | `string` | | CPUs in which to allow execution (0-3, 0,1) |
| `--cpuset-mems` | `string` | | MEMs in which to allow execution (0-3, 0,1) |
| `-m`, `--memory` | `bytes` | `0` | Memory limit |
| `--memory-reservation` | `bytes` | `0` | Memory soft limit |
| `--memory-swap` | `bytes` | `0` | Swap limit equal to memory plus swap: -1 to enable unlimited swap |
| `--pids-limit` | `int64` | `0` | Tune container pids limit (set -1 for unlimited) |
| `--restart` | `string` | | Restart policy to apply when a container exits |
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