Linux commands
Network
- ip addrShow IP/routes
- ssSockets and listening ports
- pingReachability (Linux)
- sshRemote shell
- curlHTTP client
- lsofOpen files/ports
- ncPort checks & raw sockets
- digDNS query
- tcpdumpCapture packets
- nmcliManage NetworkManager
- iptablesManage iptables firewall
- firewall-cmdManage firewalld (RHEL)
- nmapPort scanning
- mtrContinuous traceroute
- netstatConnections (legacy)
- ufwUncomplicated Firewall
- hostQuick DNS lookup
- tracerouteTrace route (Linux)
- wgetDownload (wget)
- scpCopy over SSH
- nginx -t / -sTest and reload nginx
- ssh-copy-idInstall your SSH key
- telnetPlain TCP connection test
- ethtoolNIC link diagnostics
- iperf3Measure raw throughput
- sftpInteractive file transfer over SSH
- opensslInspect TLS/cert
- resolvectlsystemd-resolved control
- smbclientAccess SMB shares
- nftnftables rules
- whoisDomain/IP registration info
- showmountList NFS exports
Files
- lsList directory
- findFind files
- cpCopy
- cdChange directory
- mvMove/rename
- rmRemove
- lnCreate links
- unzipExtract ZIP archives
- zipCreate ZIP archives
- gzipCompress with gzip
- tarArchive (tar)
- mkdirMake directory
- rsyncSync (rsync)
- treeDirectory tree view
- pwdPrint working dir
- locateFast filename search
- statFile status details
- readlink / realpathResolve links and paths
- fileIdentify file type
- splitSplit files
- touchCreate/update timestamp
- basename / dirnameSplit paths
- chgrpChange group ownership
- xzHigh-ratio xz compression
- rmdirRemove empty dir
System
- aptDebian/Ubuntu packages
- dnfRHEL-family packages
- uptimeUptime and load average
- env / exportEnvironment variables
- vmstatMemory/CPU/swap statistics
- tmuxTerminal multiplexer
- dateShow and compute dates
- sourceReload shell config
- timedatectlShow/set time & NTP
- aliasCommand aliases
- rpmQuery RPM packages
- screenDetachable terminal
- shutdown / rebootShutdown and reboot
- watchRepeat a command on screen
- dpkgQuery deb packages
- hostnamectlShow/set hostname
- ulimitResource limits
- sysctlKernel parameters
- crontabScheduled jobs (cron)
- swapon / swapoffManage swap
- timeoutRun with a time limit
- atOne-off scheduled jobs
- lddShared library dependencies
- chrootChange root (rescue)
- modprobeLoad/unload kernel module
Text
- catPrint file contents
- grepSearch text
- diffCompare files
- jqProcess JSON
- lessView with pager
- xargsBuild & run command lines
- cutExtract columns
- iconvConvert encodings
- sedStream edit
- teeWrite to screen and file
- uniqCollapse duplicate lines
- awkField processing
- headShow top lines
- trTranslate/delete chars
- base64Base64 encode/decode
- sortSort / unique
- columnAlign into a table
- stringsExtract strings from binaries
- wcCount lines/words
- xxdHex dump
- pasteJoin lines side by side
- commCompare sorted files
Disk
- dfDisk free space
- lsblkList block devices
- duDirectory size
- iostatDisk I/O statistics
- smartctlDisk health via SMART
- fdiskPartition a disk
- ddBlock-level copy
- blkidShow device UUIDs
- lvextendExtend logical volumes
- partedGPT-aware partitioning
- pvs / vgs / lvsInspect LVM layout
- mkfsCreate a filesystem
- mdadmSoftware RAID (md)
- resize2fsResize ext filesystems
- findmntMount tree view
- mountMount/unmount
- hdparmDisk info and speed test
- syncFlush write buffers
- tune2fsTune ext filesystems
- fsckCheck filesystem
Security
- sudoRun as superuser
- ssh-keygenGenerate SSH keys
- sha256sumCompute/verify checksums
- certbotLet's Encrypt certificates
- getenforce / sestatusSELinux status
- visudoEdit sudoers safely
- getfacl / setfaclPOSIX ACLs
- setenforceToggle SELinux mode
- gpgEncrypt files / verify signatures
- restoreconRestore SELinux labels
- shredSecurely erase files
Processes
Info
Accounts
Logs
Performance
Permissions
Services
Hardware
Other platforms
- Windows107 commands
- PowerShell88 commands
- Kubernetes53 commands
- macOS52 commands
- Git52 commands
- Cloud48 commands
- Cisco IOS48 commands
- SQL44 commands
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