Troubleshooting linux disk space issues at 2 am
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okay, it's 2 am, you're staring bleary-eyed at a cryptic error message about "no space left on device" on your linux server, and your brain is screaming for coffee. let's get this fixed. this guide will walk you through diagnosing and resolving disk space issues in linux, even when your cognitive functions are running on fumes.
*1. assessing the situation (the quick and dirty check):*
before diving deep, let's get a snapshot of the problem. we need to see which partitions are full and how they're being used.
*`df -h` (disk free - human readable):* this is your best friend. it shows the disk space usage of all mounted file systems in a human-readable format (e.g., gb, mb).
output (example):
**`filesystem`**: the device name (e.g., `/dev/vda1`). this is the actual disk partition.
**`size`**: total size of the partition.
**`used`**: space currently used.
**`avail`**: space available.
*`use%`**: percentage of space used. **this is the critical column.* if it's at or near 100%, you've found your culprit!
**`mounted on`**: the mount point. this is where the file system is attached to the overall directory structure. `/` is the root partition (where your core os files live). `/home` is typically where user home directories are stored. `/var` often contains logs and other variable data.
*interpreting the output:*
identify the file system with `use%` near 100%. note the `mounted on` value. this tells you which part of your file system is full (e.g., the root `/`, the `/var` directory, the `/home` directory, etc.).
*2. drilling down: finding the culprit files/directories (the detective work):*
now that you know which partition is full, you need to find out what is consuming all the space. we'll use the `du` command (disk usage) in conjunction with `sort` to find the biggest offenders.
*`du -hsx / | sort -rh | head -20` (find largest files/directories in root partitio ...
#LinuxTroubleshooting #DiskSpaceIssues #deserialization
Linux disk space troubleshooting
disk usage analysis
free space check
df command
du command
inode usage
filesystem management
log file cleanup
temporary files
disk quota management
partition resizing
emergency disk space
system performance
automated cleanup scripts
monitoring disk space