Commands by sliceoflinux

Commands by sliceoflinux (5)

sorted by

Disable the ping response

It really disables all ICMP responses not only the ping one. If you want to enable it you can use: sudo -s "echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all"
This is sample output - yours may be different.
6

sudo -s "echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all"

sliceoflinux · 2010-06-22 19:16:43 16
Change the homepage of Firefox

This command modifies the preferences file of Firefox that is located in .mozilla/firefox/*.default/prefs.js. It edits the file with sed and the -i option. Then it searches the string "browser.startup.homepage", and the string next to it (second string). Finally, it replaces the second string with the new homepage, that is http://sliceoflinux.com in the example. It doesn't work if you haven't set any homepage.
This is sample output - yours may be different.
3

sed -i 's|$"browser.startup.homepage",$ "$.*$"|\1 "http://sliceoflinux.com"|' .mozilla/firefox/*.default/prefs.js

sliceoflinux · 2010-04-09 08:00:22 7
Disable beep sound from your computer

This command will disable the beep sound from the PC speaker.
This is sample output - yours may be different.
5

echo "blacklist pcspkr"|sudo tee -a /etc/modprobe.d/blacklist.conf

sliceoflinux · 2009-09-27 11:42:47 5
Install a LAMP server in a Debian based distribution

The execution of this command will install a LAMP server (Linux, Apache, MySQL and PHP) in a Debian based distribution. For example, in Ubuntu.
This is sample output - yours may be different.
5

sudo tasksel install lamp-server

sliceoflinux · 2009-09-26 08:15:03 8
32 bits or 64 bits?
This is sample output - yours may be different.
7

sudo lshw -C cpu|grep width

sliceoflinux · 2009-09-24 11:43:00 6

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. 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.

Share Your Commands

Check These Out

Get IPv4 of eth0 for use with scripts

Combines wgzhao's grep | awk | sed into one awk command.

Debug pytest failures in the terminal

pudb is an ncurses debugger. This command will allow interactive debugging of test failures in pytest using pudb.

Create a large test file (taking no space).

Find the package that installed a command

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Use tcpdump to monitor all DNS queries and responses

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

grep (or anything else) many files with multiprocessor power

xargs -P N spawns up to N worker processes. -n 40 means each grep command gets up to 40 file names each on the command line.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Stay in the loop…

Follow the Tweets.

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.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

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:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)
» commands by sliceoflinux