| Command |
Usage |
Description |
| cat |
cat file_name.txt |
Display (output) contents of file_name.txt to screen |
| chfn |
chfn -options (options = f,o,p,h,u,v) |
change finger setting in /etc/passwd file |
| chgrp |
chown new_group filename |
change group of filename to new_group |
| chmod |
chmod u=rwx filename or chmod 777 filename |
change mode filename to (r-read,w-write,e-execute) |
| chown |
chown new_owner filename |
change ownership of filename to new_owner |
| cp |
cp f1 f2 |
copy file f1 to f2 |
| du |
du |
disk usage (storage used) |
| finger |
finger -s |
ginger username, display user\s login name etc. |
| grep |
ps -ef | grep ora |
globally search for a regular expression and print matching lines |
| gzip |
gzip |
File compression utility (zip);
IETF
RFC
-1952
|
| gunzip |
gunzip |
File de-compression utility (unzip) |
| hostname |
hostname |
Show server/host name |
| iostat |
iostat -d 5 |
I/O statistics (I/O stats once in 5 seconds)
|
| mkdir |
mkdir files |
Make directory named files in current directory |
| motd |
motd "New Storage Has Been Added" |
Message of the day (system/broadcast message) |
| mpstat |
mpstat |
Microprocessor statistics |
| netstat |
netstat |
Network statistics |
| pwd |
pwd |
Print Working Directory (current directory) |
| rmdir |
rmdir files |
Remove directory named files in current directory |
| sar |
sar -u 5 10 |
System Activity Report
(CPU utilization every 5 seconds display 10 lines)
|
| systat |
systat |
System statistics |
| tail |
tail -n 10 any_filename |
List last 10 lines of file "any_filename" |
| top |
top |
Top CPU processes |
| tr |
tr '\0' ' ' < /u01/data/fname.txt > /u01/data/fname1.txt |
Remove non-numeric characters and save as fname1.txt |
| |
tr '\137' ' ' < /u01/data/fname1.txt > /u01/data/fname2.txt |
Remove non-alpha characters and save as fname2.txt |
| uname |
uname -n |
Unix Name |
| uucp |
uucp |
unix to unix copy |
| uud |
uud |
unix - unix decode |
| uue |
uue |
unix - unix encode |
| vmstat |
vmstat |
Virtual memory statistics |
| wc |
wc -l |
Word Count |
| zcat |
zcat file_name.gz | wc -l |
List content of zip file: example to show lines in a zipped file |
| |
zcat file_name.gz | wc -c |
List content of zip file and display the character count |