split – but no destination parameter to specify
first : cd /destination/directory second : split /source/directory/big-huge-file prefix-to-apply-onto-splited-files Voila !!! (use the parameter -b to specify the size of splited files in BYTES, NOT kb, mb or gb)
convert epoch using date command
date -d ‘<Unix epoch> <epoch date> sec’ e.g. date -d ‘1970-01-01 988822888 sec’ would dated “Wed May 2 17:31:28 MYT 2001” 20080430 : get a particular date in epoch, e.g. date -d ‘Apr 30 2008 00:00:00’ ‘+%s’
How to dig SRV record after creating it in DNS
dig <record type> <host.name> e.g dig SRV _someservice._port.hostname.domainame.com.my OR dig SRV _https._ICMP.host.takizo.com
ls & rm with regular expression
e.g. rm -rf backup-20070[8-9]-* would delete : backup-200708-morning backup-200708-evening backup-200709-night backup-200709-latenight but not : backup-200706-morning backup-200707-afternoon backup-200711-midnight e.g. ls backup-20070[1-9] would list all backup starting from January to September but leave October, November & December out, of year 2007.
ssh client hang after a few minutes of inactivity
specify the parameter “ServerAliveInterval 60” in /etc/ssh_config or /etc/ssh/ssh_config. for more info, man ssh_config
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