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commandlinefu.com is the place to record those command-line gems that you return to again and again.
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- May 19, 2015 - A Look At The New Commandlinefu
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- March 2, 2015 - New Management
- I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!
Functions
- access
- acpi
- admin
- alias
- amixer
- aplay
- apropos
- apt
- ar
- arch
- arecord
- arp
- as
- at
- atq
- atrm
- aumix
- awk
- badblocks
- banner
- basename
- bash
- batch
- bc
- bg
- bison
- break
- bzgrep
- bzip2
- c++
- cal
- cat
- cc
- cd
- cdparanoia
- cdrdao
- cdrecord
- cflow
- chage
- chattr
- chgrp
- chkconfig
- chmod
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- command
- compress
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- debugfs
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- m4
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- make
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- more
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- mt
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- newgrp
- nice
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- ping
- pinky
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- pr
- printenv
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- python
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- read
- readelf
- readlink
- readonly
- reboot
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- renice
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- rev
- rm
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- rmmod
- rndc
- route
- rpm
- rsync
- scanimage
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- screen
- script
- sdiff
- sed
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- sensors
- seq
- set
- setleds
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- sh
- sha1sum
- shift
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- shred
- shutdown
- size
- skill
- sleep
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- split
- ssh
- ssh-add
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- stat
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- strings
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- su
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- swapoff
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- tabs
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- tailf
- tar
- taskset
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- test
- time
- times
- tload
- top
- touch
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- tr
- traceroute
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- true
- tty
- tune2fs
- type
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- uudecode
- uuencode
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- vi
- vim
- vmstat
- wait
- wall
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- wc
- wget
- what
- whatis
- whereis
- which
- who
- whoami
- whois
- write
- xargs
- yes
- zcat
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- zgrep
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Credits
Psst. Open beta.
Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:
- » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
- » If you wish to use your user account, you will probably need to reset your password.
Terminal - Commands using ping - 66 results
Every 20 minutes ping host with IP address 192.168.0.14. If it's not 'alive' or not reachable, then display something eye-catching (here xeyes) on the desktop.
Hint for newbies: edit crontab with
crontab -e
Quick and dirty one-liner to get the average ping(1) time from a server.
I'd rather this one on Gnome, as I'm used to be listening some music while working. I've even created a bash function which receives ADDRESS as parameter.
In case sed and awk are not available you may use this to remove the last character from a string with "rev" and "cut".
works best in a shell script run at startup. It will ping localhost once and output to null, after it does that, acpi is called for temperature in fahrenheit and piped through to another loop that feeds notify-send for a tooltip. After waiting five minutes, it will start over.
If you're very busy and don't want to wait for a ping response, use it.
This command will be waiting for a successful ping response, to play a sound file to warn you that the target host is available.
8.8.8.8 and 8.8.4.4 are two Google public DNS.
As their address is really simple, it's easy to use this command to test if Internet is reachable.
Beware of large corporate networks however, that may use this address on router's loopbacks interfaces.
Does one ping to a URL or host, and echo out just the response time. I use this on, with MRTG to monitor the connections to various hosts.
Continue to execute the command in background even though quitting the shell.
This is like ping -a, but it does the opposite. It alerts you if the network is down, not up. Note that the beep will be from the speaker on the server, not from your terminal.
Once a second, this script checks if the Internet is accessible and beeps if it is not. I define the Net as being "UP", if I can ping Google's public DNS server (8.8.8.8), but of course you could pick a different static IP address. I redirect the beep to /dev/console so that I can run this in the background from /etc/rc.local. Of course, doing that requires that the script is run by a UID or GID that has write permissions to /dev/console (usually only root).
Question: I am not sure if the -W1 flag works under BSD. I have only tested this under GNU/Linux using ping from iputils. If anybody knows how portable -W is, please post a comment.
For some reason the 2&>1 does not work for me, but the shorter stdout/stderr redirection >& works perfectly (Ubuntu 10.04).
# first install arp-scan if not have it
arp-scan 10.1.1.0/24 .... show ip+mac in localnet
awk '/00:1b:11:dc:a9:65/ {print $1}' .... get ip associated with MAC
` backtick make do command substitution passing ip to command ping
This command only check the network connection from given eth. This is very useful if you are using more then one interface in your server or laptop.
Not really an easier solution. But an example using && for (if last command returned 0). You can use || for (if last command returned other than 0)..