commandlinefu.com is the place to record those command-line gems that you return to again and again.
Delete that bloated snippets file you've been using and share your personal repository with the world. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.
If you have a new feature suggestion or find a bug, please get in touch via http://commandlinefu.uservoice.com/
You can sign-in using OpenID credentials, or register a traditional username and password.
First-time OpenID users will be automatically assigned a username which can be changed after signing in.
Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
Subscribe to the feed for:
tune2fs also provides the same information . But the information does not give the current usage , it gives the information when the file system was last mounted.
We sometimes need to change kernel parameters by echoing the file . This needs root privilege and if we do it using sudo like this , it fails
sudo echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
-bash: /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor: Permission denied
We can achieve this with the tee command by just doing sudo without logging as root user
Sometimes we may want to run a script when a system reboots . We can simply do this by just scheduling the script using vixie cron with the @reboot option .
I use it to send me an alert message on our prod hosts to send an alert message when the system reboots .
@reboot zaman uptime | echo `uptime` | mail -s "`uname -n` got rebooted" email@example.com