fix links

pingcap · Jul 15, 2023 · 5ec9459 · 5ec9459
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diff --git a/check-before-deployment.md b/check-before-deployment.md
@@ -128,7 +128,7 @@ sysctl -p
 >
 > - `sysctl -p` is to make the configuration effective without restarting the system.
 
-### Set temporary space for TiDB instances (Recommended)
+## Set temporary space for TiDB instances (Recommended)
 
 Some operations in TiDB require writing temporary files to the server, so it is necessary to ensure that the operating system user running TiDB has sufficient permissions to read and write to the target directory. If the TiDB instance is not started with the `root` privilege, you need to check the directory permissions and set them correctly.
 

diff --git a/hardware-and-software-requirements.md b/hardware-and-software-requirements.md
@@ -172,7 +172,7 @@ As an open-source distributed SQL database, TiDB requires the following network
 
 | Component | Disk space requirement | Healthy disk usage |
 | :-- | :-- | :-- |
-| TiDB | <ul><li>At least 30 GB for the log disk</li> <li> Starting from v6.5.0, `Fast Online DDL` (controlled by variable [`tidb_ddl_enable_fast_reorg`](/system-variables.md#tidb_ddl_enable_fast_reorg-new-in-v630)) is enabled by default to accelerate DDL operations, such as adding indexes. If DDL operations involving large objects exist in the system, it is highly recommended to prepare additional SSD disk space for TiDB (100 GB or higher). For detailed configuration instructions, please refer to [Set temporary space for TiDB instances]() </li></ul> | Lower than 90% |
+| TiDB | <ul><li>At least 30 GB for the log disk</li> <li> Starting from v6.5.0, `Fast Online DDL` (controlled by variable [`tidb_ddl_enable_fast_reorg`](/system-variables.md#tidb_ddl_enable_fast_reorg-new-in-v630)) is enabled by default to accelerate DDL operations, such as adding indexes. If DDL operations involving large objects exist in the system, it is highly recommended to prepare additional SSD disk space for TiDB (100 GB or higher). For detailed configuration instructions, please refer to [Set temporary space for TiDB instances](/check-before-deployment.md#set-temporary-space-for-tidb-instances-recommended) </li></ul> | Lower than 90% |
 | PD | At least 20 GB for the data disk and for the log disk, respectively | Lower than 90% |
 | TiKV | At least 100 GB for the data disk and for the log disk, respectively | Lower than 80% |
 | TiFlash | At least 100 GB for the data disk and at least 30 GB for the log disk, respectively | Lower than 80% |