![Files and rights
• Remove file
– $ rm file_name
– $ rm -i
– $ rm –r
– $ rm -rf
• Display entire file
– $ cat file_name
• Copy
– $ cp file_name1 file_name2
• Change permissions
– $ chmod [options] file_name](https://image.slidesharecdn.com/232623113-basic-linux-commands-240802054121-2f5e8143/85/232623113-Basic-Linux-Commands-docx-linux-unix-5-320.jpg)
![Job Control
• List your prcesses:
• $ top
• $ ps –ef
• $ ps –ef | grep jboss
• $ cd ~/bill = cd /home/sumedh/bill
• Kill a process
• $ kill [options] PID
• Ex: $ kill -9 624535
• Launch a job in background
• $ ./run.sh &](https://image.slidesharecdn.com/232623113-basic-linux-commands-240802054121-2f5e8143/85/232623113-Basic-Linux-Commands-docx-linux-unix-9-320.jpg)
232623113-Basic-Linux-Commands.docx linux unix
- 2. What is Linux • Linux is a Unix system • Free • Open Source • Developed by Linus Torvalds in 1991 • There are several Linux distributions: – Red hat – Fedora – Ubantu
- 3. What is Linux Shell? • Accepts your instruction or command • If it is valid command, it is passed to the kernel (part of the OS). • Several shells available with Linux. – BASH • To find current shell type: – $ echo $SHELL • To know about command: – Ex: man ls
- 4. Files and rights • List your file – $ ls – $ ls –l – $ ls –a • Display entire file – $ cat filename • Copy – $ cp filename1 filename2 • Move or change name – $ mv filename1 filename2
- 5. Files and rights • Remove file – $ rm file_name – $ rm -i – $ rm –r – $ rm -rf • Display entire file – $ cat file_name • Copy – $ cp file_name1 file_name2 • Change permissions – $ chmod [options] file_name
- 6. Files and rights • To change the rights, 2 methods with chmod: • $ chmod o+r myfile, chmod g-rw myfile, chmod u=rw,go=r myfile • $ chmod 777 myfile, chmod 555 myfile • Note: to change the rights on an entire directory: • $ chmod –R 777 mydirectory, chmod -R g+rw. • To change the owner: chown – $ chown sumedh myfile
- 7. Directories and paths • Make a new directory: • $ mkdir dir_name • “. “ is your current directory • “..” is your upper level directory • To Paths can be absolute or relative: – /home/sumedh/bill/foo.txt is an absolute path. – ../bill/foo.txt is a relative path.
- 8. Directories and paths • Change directory: • $ cd dir_name • $ cd .. • $ cd or cd ~ • $ cd ~/bill = cd /home/sumedh/bill • Current directory • $ pwd • Disk usage • $ du file_name • $ du -h
- 9. Job Control • List your prcesses: • $ top • $ ps –ef • $ ps –ef | grep jboss • $ cd ~/bill = cd /home/sumedh/bill • Kill a process • $ kill [options] PID • Ex: $ kill -9 624535 • Launch a job in background • $ ./run.sh &
- 10. Miscellaneous • Which user you have logged in: • $ whoami • Change the user: • $ su – Sumdh_Kakde • Date • $ date • Achieving : tar • $ tar –cvzf archieve_name.tar dir_name/ • $ tar –xzvf archieve_name.tar or archieve_name.tar.gz • File Compression: • $ unzip test.zip
- 11. Miscellaneous • Edit files: • $ vi file_name.txt • $ vim file_name.txt • tail command: • Print last 10 lines of the file by default – $ tail file_name.txt • Print last L number of lines from a file – $ tail –n L file_name.txt • View the contents of file in real time. – $ tail –f log_file.log