Tutorials

Solaris interview questions

1. List the files in current directory sorted by size ? - ls -l grep ^- sort -nr
2. List the hidden files in current directory ? - ls -a1 grep "^\."
3. Delete blank lines in a file ? - cat sample.txt grep -v ‘^$’ > new_sample.txt
4. Search for a sample string in particular files ? - grep “Debug” *.confHere grep uses the string “Debug” to search in all files with extension“.conf” under current directory.
5. Display the last newly appending lines of a file during appendingdata to the same file by some processes ? - tail –f Debug.logHere tail shows the newly appended data into Debug.log by some processes/user.
6. Display the Disk Usage of file sizes under each directory in currentDirectory ? - du -k * sort –nr (or) du –k . sort -nr
7. Change to a directory, which is having very long name ? - cd CDMA_3X_GEN*Here original directory name is – “CDMA_3X_GENERATION_DATA”.
8. Display the all files recursively with path under current directory ? - find . -depth -print
9. Set the Display automatically for the current new user ? - export DISPLAY=`eval ‘who am i cut -d"(" -f2 cut -d")" -f1′`Here in above command, see single quote, double quote, grave ascent is used. Observe carefully.
10. Display the processes, which are running under yourusername ? - ps –aef grep MaheshvjHere, Maheshvj is the username.
11. List some Hot Keys for bash shell ? - Ctrl+l – Clears the Screen. Ctrl+r – Does a search in previously given commands in shell. Ctrl+u - Clears the typing before the hotkey. Ctrl+a – Places cursor at the beginning of the command at shell. Ctrl+e – Places cursor at the end of the command at shell. Ctrl+d – Kills the shell. Ctrl+z – Places the currently running process into background.
12. Display the files in the directory by file size ? - ls –ltr sort –nr –k 5
13. How to save man pages to a file ? - man col –b > Example : man top col –b > top_help.txt
14. How to know the date & time for – when script is executed ? - Add the following script line in shell script.eval echo "Script is executed at `date`" >> timeinfo.infHere, “timeinfo.inf” contains date & time details ie., when script is executed and history related to execution.
15. How do you find out drive statistics ? - iostat -E
16. Display disk usage in Kilobytes ? - du -k
17. Display top ten largest files/directories ? - du -sk * sort -nr head
18. How much space is used for users in kilobytes ? - quot -af
19. How to create null file ? - cat /dev/null > filename1
20. Access common commands quicker ? - ps -ef grep -i $@
21. Display the page size of memory ? - pagesize -a
22. Display Ethernet Address arp table ? - arp -a
23. Display the no.of active established connections to localhost ? - netstat -a grep EST
24. Display the state of interfaces used for TCP/IP traffice ? - netstat -i
25. Display the parent/child tree of a process ? - ptree Example: ptree 1267
26. Show the working directory of a process ? - pwdx Example: pwdx 1267
27. Display the processes current open files ? - pfiles Example: pfiles 1267
28. Display the inter-process communication facility status ? - ipcs
29. Display the top most process utilizing most CPU ? - top –b 1
30. Alternative for top command ? - prstat -a

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