Many Linux commands come to mind, some of which are unknown and others are common, as follows:
- Xargs or parallel: runs some programs in parallel and has many options for commands.
- Sed and awk: widely known and useful command for processing text files, faster than Python and Ruby
- M4: simple macro Processing Command
- Screen: Powerful terminal reuse and session persistence tools, see http://www.ibm.com/developerworks/cn/linux/l-cn-screen/
- Yes: Repeated output strings see http://codingstandards.iteye.com/blog/826940
- CAL: Very nice calendar
- Env: run a command, which is very useful in scripts.
- Look: Search for English words starting with a string
- Cut and paste and join: data operation command
- FMT: format a Text Segment
- PR: format a string of text or a large file in units of a page/column, see the http://hi.baidu.com/mchina_tang/item/1ce11d5d317dfc05aaf6d70d
- Fold: wrap text
- Column: format text into columns or tables
- Expand and unexpand: Convert Between tabs and spaces
- NL: Add row number
- SEQ: print the row number
- BC: Calculator
- Factor: the factor that outputs an integer. The factor outputs an integer prime factor.
- NC: Network debugging and Data Transmission
- DD: move data between files and devices
- File: determines the type of a file.
- Stat: view the File status
- Tac: output file content from the last line, which is opposite to CAT output
- Shuf: randomly selects data for a file by row.
- COMM: compare an ordered file by row
- HD and BVI: outputs or edits binary files
- Strings: view the content in the binary file
- TR: character translation or operation character
- Iconv or uconv: the string to be converted.
- Split and csplit: Divide files
- 7z: compressed files with high compression ratio
- LDD: View dynamic library information
- NM: view the symbol table in the target file
- AB: website server stress testing tool
- Strace: Debug system calls
- MTR: a better route tracking tool for network debugging
- Cssh: Visual concurrent Shell
- Wireshark and tshark: Packet Capture and network debugging
- Host and dig: Find DNS
- Lsof: view process file descriptors and socket Information
- Dstat: a useful statistical tool for system data.
- Iostat: CPU and disk usage statistics
- Htop: improved version of top
- Last: logon history
- W: Current Login User
- ID: view User/group representation Information
- SAR: Tools for viewing historical system statistics
- Iftop or nethogs: view the network utilization of the socket or process
- SS: View statistics
- Dmesg: startup or system error message
- (Linux) hdparm: displays or sets disk parameters.
- (Linux) lsb_release: view the release version of the Linux System
- (Linux) lshw: View hardware information
- Fortune, ddate, and SL: It depends on whether you think the steam engine is more useful than quotes.
For more commands, see Joshua Levy's reply in another Q & A post, "command line saving skills that every linux user should understand.
Some useful but unknown Unix Commands
