KAHIBARO
- 1. PART I Linux Fundamentals (Beginner) ›
- 2. PART II Command Line Essentials ›
- 3. PART III Intermediate System Administration ›
- 4. PART IV Advanced Linux Skills ›
- 5. PART V Server Administration (Expert) ›
- 6. PART VI DevOps and Cloud ›
- 7. PART VII Master Topics ›
1.5.2.4. `/tmp`
Table of Contents
What `/tmp` Is For
/tmp is a special directory intended for temporary files:
- Used by applications, installers, and sometimes by users for short‑lived data.
- Files here are not meant to be permanent.
- Often cleaned automatically, either:
- at boot, or
- after files have been unused for some time.
Typical things that end up in /tmp:
- Temporary downloads
- Editor swap files (e.g., when editing documents)
- Application caches that don’t need to survive a reboot
- Temporary sockets and pipes used by programs
You can think of /tmp as a shared scratchpad for the whole system.
Characteristics of `/tmp`
While the exact behavior can vary by distribution, /tmp usually has these properties:
- World-writable: any user can create files there.
- Restricted deletion: users can only remove their own files.
- Temporary lifetime: files can disappear without warning.
You can inspect its permissions with:
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Where to Move
Move chapter:
- ☰ 1. PART I Linux Fundamentals (Beginner)
- ☰ 1.1. What Is Linux?
- ☰ 1.1.1. What is an operating system
- ☰ 1.1.2. History of Unix and Linux
- ☰ 1.1.3. The Linux kernel
- ☰ 1.1.4. GNU and the Free Software Foundation
- ☰ 1.1.5. Open source philosophy
- ☰ 1.1.6. Where Linux is used today
- ☰ 1.1.7. Desktop vs server vs embedded Linux
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- ☰ 1.2. Choosing a Linux Distribution
- ☰ 1.2.1. What is a distribution?
- ☰ 1.2.2. Package formats (deb, rpm, pacman)
- ☰ 1.2.3. Popular distributions
- ☰ 1.2.3.1. Ubuntu
- ☰ 1.2.3.2. Debian
- ☰ 1.2.3.3. Fedora
- ☰ 1.2.3.4. Arch Linux
- ☰ 1.2.3.5. openSUSE
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- ☰ 1.2.4. Rolling vs fixed release
- ☰ 1.2.5. Choosing the right distribution
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- ☰ 1.3. Installing Linux
- ☰ 1.3.1. Creating a bootable USB
- ☰ 1.3.2. Installing on real hardware
- ☰ 1.3.3. Dual booting with Windows
- ☰ 1.3.4. Installing in a virtual machine
- ☰ 1.3.5. Partitioning
- ☰ 1.3.5.1. `/` (root)
- ☰ 1.3.5.2. `/home`
- ☰ 1.3.5.3. Swap
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- ☰ 1.3.6. First-time setup
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- ☰ 1.4. First Steps After Installation
- ☰ 1.4.1. Desktop environment basics
- ☰ 1.4.2. Updating the system
- ☰ 1.4.3. Installing essential tools
- ☰ 1.4.4. Setting up drivers
- ☰ 1.4.5. Using the software center
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- ☰ 1.5. Linux Filesystem Hierarchy
- ☰ 1.5.1. Overview of the root filesystem
- ☰ 1.5.2. Important directories
- ☰ 1.5.2.1. `/etc`
- ☰ 1.5.2.2. `/var`
- ☰ 1.5.2.3. `/usr`
- ☰ 1.5.2.4. `/tmp`
- ☰ 1.5.2.5. `/dev`
- ☰ 1.5.2.6. `/proc`
- ☰ 1.5.2.7. `/sys`
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- ☰ 1.5.3. File types
- ☰ 1.5.4. Absolute vs relative paths
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- ☰ 1.6. The Linux Graphical Environment
- ☰ 1.6.1. GNOME
- ☰ 1.6.2. KDE Plasma
- ☰ 1.6.3. XFCE
- ☰ 1.6.4. File managers
- ☰ 1.6.5. System settings
- ☰ 1.6.6. Workspaces and window management
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- ☰ 2. PART II Command Line Essentials
- ☰ 2.1. Terminal and Shell Basics
- ☰ 2.1.1. What is a shell?
- ☰ 2.1.2. Bash vs Zsh vs Fish
- ☰ 2.1.3. Command structure
- ☰ 2.1.4. Environment variables
- ☰ 2.1.5. Getting help
- ☰ 2.1.6. Command history and autocomplete
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- ☰ 2.2. Files and Directories
- ☰ 2.2.1. Listing files
- ☰ 2.2.2. Navigating directories
- ☰ 2.2.3. File operations
- ☰ 2.2.4. Wildcards and globbing
- ☰ 2.2.5. Searching files
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- ☰ 2.3. Viewing and Editing Text Files
- ☰ 2.3.1. Viewing tools
- ☰ 2.3.2. Editing with nano
- ☰ 2.3.3. Introduction to vim
- ☰ 2.3.4. Input/output redirection
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- ☰ 2.4. Users, Permissions, and Ownership
- ☰ 2.4.1. Users and groups
- ☰ 2.4.2. Permission types (r, w, x)
- ☰ 2.4.3. Changing permissions
- ☰ 2.4.4. Changing ownership
- ☰ 2.4.5. Using sudo
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- ☰ 2.5. Package Management
- ☰ 2.5.1. Software repositories
- ☰ 2.5.2. APT (Debian/Ubuntu)
- ☰ 2.5.3. DNF (Fedora/RHEL)
- ☰ 2.5.4. Pacman (Arch Linux)
- ☰ 2.5.5. Snap, Flatpak, AppImage
- ☰ 2.5.6. System upgrades
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- ☰ 2.6. Working with Processes
- ☰ 2.6.1. What is a process?
- ☰ 2.6.2. Viewing processes
- ☰ 2.6.3. Killing processes
- ☰ 2.6.4. Foreground and background jobs
- ☰ 2.6.5. System services and daemons
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- ☰ 2.7. Introduction to Shell Scripting
- ☰ 2.7.1. Writing your first script
- ☰ 2.7.2. Variables
- ☰ 2.7.3. Conditionals
- ☰ 2.7.4. Loops
- ☰ 2.7.5. Functions
- ☰ 2.7.6. Making scripts executable
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- ☰ 3. PART III Intermediate System Administration
- ☰ 3.1. Systemd and Service Management
- ☰ 3.1.1. What is systemd?
- ☰ 3.1.2. Managing services (systemctl)
- ☰ 3.1.3. Boot targets
- ☰ 3.1.4. System logs (journalctl)
- ☰ 3.1.5. Creating custom services
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- ☰ 3.2. Storage and Filesystems
- ☰ 3.2.1. Devices and partitions
- ☰ 3.2.2. Filesystems (EXT4, XFS, Btrfs)
- ☰ 3.2.3. Mounting and unmounting
- ☰ 3.2.4. Disk usage tools
- ☰ 3.2.5. Archiving and compression (tar, gzip, xz)
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- ☰ 3.3. Networking Fundamentals
- ☰ 3.3.1. IP addressing
- ☰ 3.3.2. Subnets and routing
- ☰ 3.3.3. DNS and hostnames
- ☰ 3.3.4. Networking tools (ip, ss, ping)
- ☰ 3.3.5. Editing network configuration files
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- ☰ 3.4. User and Group Administration
- ☰ 3.4.1. User information files
- ☰ 3.4.2. Creating and removing users
- ☰ 3.4.3. Password policies
- ☰ 3.4.4. Managing groups
- ☰ 3.4.5. Shell configuration
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- ☰ 3.5. System Monitoring
- ☰ 3.5.1. CPU and memory monitoring
- ☰ 3.5.2. Disk and I/O monitoring
- ☰ 3.5.3. Log files in /var/log
- ☰ 3.5.4. Boot performance
- ☰ 3.5.5. Monitoring running services
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- ☰ 3.6. Backup and Restore
- ☰ 3.6.1. Backup strategies
- ☰ 3.6.2. Using rsync
- ☰ 3.6.3. Creating tar archives
- ☰ 3.6.4. Using snapshot systems
- ☰ 3.6.5. Automating backups
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- ☰ 3.7. Basic System Security
- ☰ 3.7.1. Firewalls (UFW, firewalld)
- ☰ 3.7.2. Authentication policies
- ☰ 3.7.3. SSH security basics
- ☰ 3.7.4. SELinux and AppArmor overview
- ☰ 3.7.5. Intrusion detection basics
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- ☰ 4. PART IV Advanced Linux Skills
- ☰ 4.1. Advanced Shell Scripting
- ☰ 4.1.1. Script structure
- ☰ 4.1.2. Error handling
- ☰ 4.1.3. Debugging scripts
- ☰ 4.1.4. Scheduled tasks (cron)
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- ☰ 4.2. The Linux Boot Process
- ☰ 4.2.1. BIOS vs UEFI
- ☰ 4.2.2. Understanding GRUB2
- ☰ 4.2.3. Kernel loading
- ☰ 4.2.4. initramfs
- ☰ 4.2.5. Troubleshooting boot issues
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- ☰ 4.3. Kernel Management
- ☰ 4.3.1. What is the kernel?
- ☰ 4.3.2. Kernel modules
- ☰ 4.3.3. Kernel parameters
- ☰ 4.3.4. Compiling a custom kernel
- ☰ 4.3.5. Kernel versioning and updates
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- ☰ 4.4. Advanced Filesystems and Storage
- ☰ 4.4.1. LVM concepts
- ☰ 4.4.2. Logical volumes
- ☰ 4.4.3. RAID levels
- ☰ 4.4.4. Full disk encryption (LUKS)
- ☰ 4.4.5. Snapshots and rollbacks
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- ☰ 4.5. Network Services
- ☰ 4.5.1. SSH server configuration
- ☰ 4.5.2. NFS
- ☰ 4.5.3. Samba
- ☰ 4.5.4. FTP/SFTP
- ☰ 4.5.5. Firewalls in depth
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- ☰ 4.6. Logging and Auditing
- ☰ 4.6.1. Systemd logging
- ☰ 4.6.2. Traditional logs in /var/log
- ☰ 4.6.3. Auditd
- ☰ 4.6.4. Log rotation
- ☰ 4.6.5. Creating custom logs
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- ☰ 4.7. Virtualization and Containers
- ☰ 4.7.1. Virtual machines (KVM/QEMU)
- ☰ 4.7.2. Linux containers (LXC/LXD)
- ☰ 4.7.3. Docker fundamentals
- ☰ 4.7.4. Podman vs Docker
- ☰ 4.7.5. Container networking
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- ☰ 5. PART V Server Administration (Expert)
- ☰ 5.1. Web Servers
- ☰ 5.1.1. Apache basics
- ☰ 5.1.2. Nginx basics
- ☰ 5.1.3. Virtual hosts
- ☰ 5.1.4. SSL/HTTPS
- ☰ 5.1.5. Reverse proxy concepts
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- ☰ 5.2. Database Servers
- ☰ 5.2.1. MySQL/MariaDB
- ☰ 5.2.2. PostgreSQL
- ☰ 5.2.3. Database backup strategies
- ☰ 5.2.4. Database hardening
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- ☰ 5.3. Email Services
- ☰ 5.3.1. SMTP fundamentals
- ☰ 5.3.2. Configuring Postfix
- ☰ 5.3.3. IMAP/POP3 with Dovecot
- ☰ 5.3.4. Spam filtering systems
- ☰ 5.3.5. Email routing concepts
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- ☰ 5.4. DNS and DHCP
- ☰ 5.4.1. Understanding DNS
- ☰ 5.4.2. Setting up BIND
- ☰ 5.4.3. DNS zones and records
- ☰ 5.4.4. DHCP server configuration
- ☰ 5.4.5. DNS troubleshooting
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- ☰ 5.5. Load Balancing
- ☰ 5.5.1. HAProxy fundamentals
- ☰ 5.5.2. Nginx as a load balancer
- ☰ 5.5.3. Session persistence
- ☰ 5.5.4. High availability concepts
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- ☰ 5.6. Clustering and High Availability
- ☰ 5.6.1. Failover principles
- ☰ 5.6.2. Pacemaker
- ☰ 5.6.3. Corosync
- ☰ 5.6.4. Cluster resource management
- ☰ 5.6.5. Distributed filesystems
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- ☰ 6. PART VI DevOps and Cloud
- ☰ 6.1. Linux for Developers
- ☰ 6.1.1. Compiler toolchains (gcc, make)
- ☰ 6.1.2. Git fundamentals
- ☰ 6.1.3. Debugging tools (gdb, strace)
- ☰ 6.1.4. Build automation (Makefile, CMake)
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- ☰ 6.2. DevOps on Linux
- ☰ 6.2.1. CI/CD principles
- ☰ 6.2.2. YAML basics
- ☰ 6.2.3. GitHub Actions
- ☰ 6.2.4. GitLab CI/CD
- ☰ 6.2.5. Automated testing
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- ☰ 6.3. Configuration Management
- ☰ 6.3.1. Ansible basics
- ☰ 6.3.2. Playbooks and inventories
- ☰ 6.3.3. Puppet overview
- ☰ 6.3.4. Chef overview
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- ☰ 6.4. Infrastructure as Code
- ☰ 6.4.1. Terraform fundamentals
- ☰ 6.4.2. Providers and resources
- ☰ 6.4.3. Modules
- ☰ 6.4.4. Cloud provisioning with Terraform
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- ☰ 6.5. Cloud Computing with Linux
- ☰ 6.5.1. Linux on AWS
- ☰ 6.5.2. Linux on Azure
- ☰ 6.5.3. Linux on GCP
- ☰ 6.5.4. Cloud networking basics
- ☰ 6.5.5. Scaling and monitoring
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- ☰ 7. PART VII Master Topics
- ☰ 7.1. Hardening a Linux System
- ☰ 7.1.1. Hardening principles
- ☰ 7.1.2. Kernel hardening
- ☰ 7.1.3. File integrity monitoring
- ☰ 7.1.4. Vulnerability scanning
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- ☰ 7.2. Forensics and Incident Response
- ☰ 7.2.1. Collecting evidence
- ☰ 7.2.2. Log and file recovery
- ☰ 7.2.3. Analyzing suspicious processes
- ☰ 7.2.4. Incident response workflow
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- ☰ 7.3. Performance Tuning
- ☰ 7.3.1. CPU tuning
- ☰ 7.3.2. Memory tuning
- ☰ 7.3.3. Disk and I/O optimization
- ☰ 7.3.4. Profiling tools
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- ☰ 7.4. Writing Linux Tools
- ☰ 7.4.1. Bash-based tools
- ☰ 7.4.2. Python command-line tools
- ☰ 7.4.3. Writing tools in C
- ☰ 7.4.4. Using Linux system APIs
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- ☰ 7.5. Linux Internals
- ☰ 7.5.1. Process lifecycle
- ☰ 7.5.2. Memory management
- ☰ 7.5.3. Signals and IPC
- ☰ 7.5.4. Namespaces
- ☰ 7.5.5. cgroups
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- ☰ 7.6. Becoming a Linux Expert
- ☰ 7.6.1. Career paths
- ☰ 7.6.2. Certifications (RHCE, LFCS, LPIC)
- ☰ 7.6.3. Building a homelab
- ☰ 7.6.4. Contributing to open source
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