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How to clone a disk in Linux using the dd command? (With Examples)
Be careful when using the dd command for Linux disk cloning: first use lsblk or fdisk-l to identify the source/destination device and uninstall it, then execute sudoddif=/dev/sdXof=/dev/sdbbs=64Kstatus=progressconv=noerror,sync, and finally use dd sha256sum to compare the first 100MB to verify integrity.
Jan 11, 2026 am 02:09 AM
How to Create a Symbolic Link (Symlink) in Linux? (ln Command Tutorial)
TocreateasymboliclinkinLinux,useln-stargetsymlink_name;preferabsolutepathsforreliability,use-ftosafelyoverwrite,andverifywithls-lorreadlink.
Jan 10, 2026 am 05:04 AM
How to find all files larger than 1GB in Linux? (find Command Snippet)
Use the find command to find files larger than 1GB in Linux: sudofind/-typef-size 1G2>/dev/null can scan the entire disk, find~/Downloads-typef-size 1G is more safe and efficient, and can be sorted and displayed by size with -du-h and sort-hr.
Jan 10, 2026 am 01:00 AM
How to Mount and Unmount Drives in Linux? (mount Command Guide)
Linux uses the mount and umount commands to mount and unmount drives, which require root privileges; you can use mount, findmnt, or lsblk to view the mounted file system; manual mounting requires a device path and an empty mount point; make sure that no process is occupied before unmounting; /etc/fstab supports automatic mounting at boot.
Jan 09, 2026 am 05:24 AM
How to Change the Hostname on a Linux System? (Quick Tutorial)
Use the hostnamectl command to modify the runtime and persistent host names at the same time, which is suitable for modern Linux systems; the corresponding entries in /etc/hosts need to be updated to ensure normal local resolution. Non-systemd systems need to manually edit /etc/hostname or /etc/sysconfig/network.
Jan 09, 2026 am 05:05 AM
How to List Running Processes in Linux? (ps and top Examples)
The most commonly used tools for viewing running processes in Linux are ps and top: ps provides static snapshots, suitable for scripts and quick checks; top provides real-time interactive monitoring, which can dynamically sort, kill processes and observe resource changes.
Jan 08, 2026 am 02:55 AM
How to Set Up an SSH Tunnel on Linux? (A Practical Example)
There are three common modes for SSH tunnels: 1. Local port forwarding (-L) maps remote services to local ports; 2. Remote port forwarding (-R) exposes local services to remote servers; 3. Dynamic SOCKS proxy (-D) enables flexible application layer traffic forwarding, all done through the ssh command line.
Jan 08, 2026 am 01:05 AM
How to configure the hosts file in Linux
Edit/etc/hostswithrootprivilegestomaphostnamestoIPs,suchasadding"192.168.1.5myapp.local",thensaveandtestusingpingorgetenttoconfirmresolutionworksimmediately.
Jan 07, 2026 am 05:46 AM
How to Copy Files and Directories in Linux with cp? (Syntax and Examples)
The cp command is used to copy files and directories in Linux. The basic syntax is cp source path and target path; you need to add the -r flag to copy the directory; -i can avoid overwriting prompts, -n skips existing files, and -v displays the detailed process.
Jan 07, 2026 am 03:31 AM
How to Set Up Passwordless SSH Login in Linux? (ssh-keygen Guide)
Passwordless SSH login requires three steps: generate a key pair (such as ssh-keygen-ted25519), use ssh-copy-id to copy the public key to the remote server authorized_keys, and check the server configuration (PubkeyAuthenticationyes) and permissions (~/.ssh700, authorized_keys600).
Jan 06, 2026 am 01:57 AM
How to Zip and Unzip Files in Linux? (tar and zip Commands)
In Linux, zip/unzip is used for cross-platform compatible compressed archives, and tar is used for archive compression that preserves Unix features such as permissions. zip completes compression and packaging in a single step, and tar packages first and then compresses, and supports multiple algorithms such as gzip and xz.
Jan 06, 2026 am 12:36 AM
How to open a port in the Linux firewall
ToopenaportinLinux,usefirewalldoriptablesbasedonyoursystem.Forfirewalld(CentOS/RHEL/Fedora),run:sudofirewall-cmd--permanent--add-port=8080/tcp,thenreloadwith--reloadandverifywith--list-ports.Foriptables(Debian/Ubuntu/oldersystems),use:sudoiptables-AI
Jan 05, 2026 am 12:40 AM
How to Check Disk Space in Linux? (Step-by-Step Guide)
Linux disk space check mainly uses df-h to check the overall usage, du-sh to analyze directory occupancy, and df-i to troubleshoot inode exhaustion problems; it can be combined with tools such as sort, find, and ncdu to accurately locate space bottlenecks.
Jan 05, 2026 am 12:32 AM
How to create and delete partitions in Linux with fdisk
Uselsblktoidentifythetargetdisklike/dev/sdb.2.Runsudofdisk/dev/sdbtoenterinteractivemode.3.Typentocreateanewpartition,specifytypeandsize,ordtodeleteanexistingone.4.Verifychangeswithpandsavewithw.5.Formatthenewpartitionusingsudomkfs.ext4/dev/sdb1andmo
Jan 04, 2026 am 06:23 AM
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