All commands (14,187)
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36ssh root@remote.host "rpm -qa" | xargs yum -y install
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Nothing special required, just wget, sed & tr! Show Sample Output
36wget http://www.youtube.com/watch?v=dQw4w9WgXcQ -qO- | sed -n "/fmt_url_map/{s/[\'\"\|]/\n/g;p}" | sed -n '/^fmt_url_map/,/videoplayback/p' | sed -e :a -e '$q;N;5,$D;ba' | tr -d '\n' | sed -e 's/\(.*\),\(.\)\{1,3\}/\1/' | wget -i - -O surprise.flv -
Instead of opening your browser, googling "whatismyip"... Also useful for scripts. dig can be found in the dnsutils package.
36dig +short myip.opendns.com @resolver1.opendns.com -
Create a binary clock. Show Sample Output
36watch -n 1 'echo "obase=2;`date +%s`" | bc' -
Probably only works with GNU du and modern perls. Show Sample Output
36du -b --max-depth 1 | sort -nr | perl -pe 's{([0-9]+)}{sprintf "%.1f%s", $1>=2**30? ($1/2**30, "G"): $1>=2**20? ($1/2**20, "M"): $1>=2**10? ($1/2**10, "K"): ($1, "")}e' -
36mkdir -p work/{d1,d2}/{src,bin,bak}
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This recursively downloads all images from a given website to your /tmp directory. The -nH and -nd switches disable downloading of the directory structure.
36wget -r -l1 --no-parent -nH -nd -P/tmp -A".gif,.jpg" http://example.com/images -
parse `lsmod' output and pass to `dot' drawing utility then finally pass it to an image viewer
35lsmod | perl -e 'print "digraph \"lsmod\" {";<>;while(<>){@_=split/\s+/; print "\"$_[0]\" -> \"$_\"\n" for split/,/,$_[3]}print "}"' | dot -Tpng | display - -
show only the name of the apps that are using internet Show Sample Output
35lsof -P -i -n | cut -f 1 -d " "| uniq | tail -n +2 -
This uses Bash's "process substitution" feature to compare (using diff) the output of two different process pipelines.
35diff <(cd dir1 && find | sort) <(cd dir2 && find | sort) -
Very handy to bring the word currently under the cursor into a :s command in Vim. Example: If the cursor was on the word "eggs": :s/ ==> :s/eggs
35:<C-R><C-W> -
If you spend most of your time in front of the terminal, leave is a useful reminder. Leave can have absolute form: leave 1555 reminds you to leave at 3:55PM Show Sample Output
35leave +15 -
youtube-dl has this functionality built in. If you're running an older version of youtube-dl, you can update it using `youtube-dl -U` (although if you have an older version, it probably doesn't download youtube videos anyway.) youtube-dl --help will show you other options that may come in useful.
34youtube-dl -t --extract-audio --audio-format mp3 YOUTUBE_URL_HERE -
Ever ask yourself "How much data would be lost if I pressed the reset button?" Scary, isn't it? Show Sample Output
34grep ^Dirty /proc/meminfo -
SSH can be controlled trough an ~ escape sequence. Example, to terminate the current ssh connection, type a newline, then the ~ character, and last a . character. This is useful eg when an ssh connection hangs after you reboot a machine and the connection hangs. Show Sample Output
34[enter]~? -
Tee can be used to split a pipe into multiple streams for one or more process to work it. You can add more " >()" for even more fun. Show Sample Output
34echo "tee can split a pipe in two"|tee >(rev) >(tr ' ' '_') -
Much simpler method. More portable version: ssh host -l user "`cat cmd.txt`"
34ssh host -l user $(<cmd.txt) -
34for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > "$I.sql.gz"; done
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Knock on ports to open a port to a service (ssh for example) and knock again to close the port. You have to install knockd. See example config file below. [options] logfile = /var/log/knockd.log [openSSH] sequence = 3000,4000,5000 seq_timeout = 5 command = /sbin/iptables -A INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn [closeSSH] sequence = 5000,4000,3000 seq_timeout = 5 command = /sbin/iptables -D INPUT -i eth0 -s %IP% -p tcp --dport 22 -j ACCEPT tcpflags = syn
34knock <host> 3000 4000 5000 && ssh -p <port> user@host && knock <host> 5000 4000 3000 -
History usually only gives the command number and the command. This will add a timestamp to the history file. Note: this will only put the correct timestamp on commands used after the export is done. You may want to put this in your .bashrc Show Sample Output
34export HISTTIMEFORMAT="%F %T " -
34find ./ -type f -exec chmod 644 {} \;
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Useful mainly for debugging or troubleshooting an application or system, such as X11, Apache, Bind, DHCP and others. Another useful switch that can be combined with -mmin, -mtime and so forth is -daystart. For example, to find files that were modified in the /etc directory only yesterday:
sudo find /etc -daystart -mtime 1 -type f34sudo find / -mmin 60 -type f -
33showkey -a
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expand to: cp /work/host/phone/ui/main.cpp /work/target/phone/ui/main.cpp !# The entire command line typed so far.
33cp /work/host/phone/ui/main.cpp !#$:s/host/target -
I have a bash alias for this command line and find it useful for searching C code for error messages. The -H tells grep to print the filename. you can omit the -i to match the case exactly or keep the -i for case-insensitive matching. This find command find all .c and .h files Show Sample Output
33find . -name "*.[ch]" -exec grep -i -H "search pharse" {} \; - ‹ First < 4 5 6 7 8 > Last ›
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