See Command list, Windows Tips, File Compression, Linux Tips, Scripts
Send byte to serial port echo -e "\xFF\x00\x00" > /dev/ttyUSB0 |
See os log #HP tail -100f /var/adm/syslog/syslog.log #Sun dmesg tail -100f /var/adm/messages |
File system /etc/group - user groups /etc/hosts - Locally defined hosts (Unix) /etc/passwd - passwords /etc/redhat-release - [cat] Provide linux base version (Linux RedHat) /proc/version - [cat] Provide linux base version (Linux) /etc/redhat-release - [cat] Redhat version (Redhat Linux) /proc/sys/kernel/tainted - [cat] List no open-source modules /etc/shells - all available shells /var/spool/mail/smith - mail spool location (Linux) |
vi (most usefull) Use TERM=vt100 %d - delete all text :set noautoindent #same as :set noautonindent on vi, put this on .profile EXINIT="set noai" ; export EXINIT |
Mailx echo "pirlone" | mailx -s "this is subject" aldo@fadalti.com #Body taken from file cat attach.html | mailx -s "this is subject" info@fadalti.com aldo@fadalti.com #Attachments general way #on Linux you may find uuencode on sharutils 4.2.1 uuencode attach.html attach.html | mailx -s "this is subject" info@fadalti.com aldo@fadalti.com echo "attachment text" | uuencode cron.txt | mailx -s "culo" a.fadalti@loyalty.co.uk sending sms #you need to know what email address is dedicated for sms forwarding #instead of subject the destination numbers are used echo "pirloneu" | mailx -s "+393383730860;+393383730860" esisms@fastweb.it Untested Send the content of a file mail aldo@fadalti.com < /myfile |
| See if system is paging out (IBM AIX, Solaris) >vmstat 3 3 kthr memory page faults cpu ----- ----------- ------------------------ ------------ ----------- r b avm fre re pi po fr sr cy in sy cs us sy id wa 8 2 3746722 4767 0 5 6 2039 5616 0 3434 95591 20744 41 8 41 10 16 2 3746727 4203 0 0 0 2904 33175 0 3794 245313 32224 73 12 10 5 15 3 3747141 4258 0 0 0 4609 42401 0 3949 219184 31757 69 15 10 7 Look for po column, if 0 there's no paging |
Internet IPThe following IP addresses are set aside for local networks, and are not allowed on the Internet: 10.0.0.0 to 10.255.255.255 172.16.0.0 to 172.31.255.255 192.168.0.0 to 192.168.255.255 |
securecrt /ssh2 db801aol.intranet.fw /l oracle /password pippo |
Permissions drwxr----x On a directory you can only list the content |