All commands (14,187)
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0column -s, -t < somefile.csv | less -#2 -N -S
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This might one day deliver the melody to the next super hit on the radio if played long enough
0python -c "import os; print([i * bytearray(os.urandom(10)) for i in bytearray(os.urandom(10000))])" | padsp tee /dev/audio > /dev/null -
0ifconfig eth0 | sed -n 's/.*inet addr:\([0-9\.]*\).*/\1/p'
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netstat doesn't always function similarly across the board. Also the use of three commands in the original (netstat followed by grep followed by grep) is a waste of pipes
0lsof -i :80 | tee /dev/stderr | wc -l -
Useful when you wait for a server to boot up.
0while true; do ssh login@10.0.0.1; if [[ $? -ne 0 ]]; then echo "Nope, keep trying!"; fi; sleep 10; done -
The $[...] block in bash and zsh will let you do math.
echo $[6*7]This is the same as using $((...)), which also works in ksh. Of course, this is a simple, dumb wrapper and doesn't allow floating-point. Show Sample Output0while true; do read i; echo $[$i]; done -
If used without arguments, returns own IP info. If used with argument, returns info about the parsed argument. Show Sample Output
0geoip () { curl -s "http://www.geoiptool.com/?IP=$1" | html2text | egrep --color 'City:|IP Address:|Country:' } -
Displays battery power status Show Sample Output
0webattery -
It's actually really helpful if you've done a lot of replaces in say a header file, and now you want to replace the same text in the source code file.
0In vim: q: && v[cursor movement]y && [paste/edit/save to /tmp/tmp.vim] && move to window to modify && :so /tmp/tmp.vim -
Useful for creating MAC addresses for virtual machines on a subnet. 00:16:3e is a standard Xen OID, change as needed. Show Sample Output
0echo 00:16:3e$(gethostip 10.1.2.11 | awk '{ print tolower(substr($3,3)) }' |sed 's/.\{2\}/:&/g' ) -
Usage: VBoxBlockBoot [Virtual_Machine] [Block_device] Eg: VBoxBlockBoot WinXP /dev/sdc In another words
vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vmWhere vm --> Name of the virtual machine to start usb --> Block device to use. (/dev/sdc) This can used after setup up a boot loader on to my USB pen drive or HDD (After creating Live USB). Here root privilege is needed but not granted to Virtual Box. Thus we can access all our VM.( If we run VBox as root we can't access our VMs). Root privilege is used to - Unmount the storage device - Chmod to full access (777) Requirements:- 1. Device information file (rawvmdk file) created by the following command. Need to run only once. Not bad to run many.VBoxCreateRawDisk() { VBoxManage internalcommands createrawvmdk -filename ~/.rawHD4VB_`basename "$1"`.vmdk -rawdisk "$1"; }2. Root privilege to umount & chmod 3. Real storage medium (ie /dev/*) (Non-virtual such as USB HD, pen drive, a partition) 4. A virtual m/c already available (here "usb") vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vm VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1"; } Show Sample Output0VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1";} -
0tshark -r data.pcap -R "ip.addr==192.168.1.2 && ip.addr==64.12.24.50 && aim" -d tcp.port==443,aim -T fields -e "aim.buddyname" |sort |uniq -c
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bash-3.2$ find /logs -ls -xdev | sort -nrk 7 | head -10 1761905 205380 -rwxrwxr-x 1 wsadmin logadmin 210095353 Jul 22 01:33 /logs/intlpymt/Trace.log 652689 187360 -rwxrwxr-x 1 wsadmin logadmin 191663182 Jul 21 23:00 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut_13.07.21_23.00.12.log 2380449 186536 -rwxrwxr-x 1 wsadmin logadmin 190819939 Jul 16 14:03 /logs/omset/traceIntl.log.201307161403.lppwa1213.gz 2119524 183888 -rwxrwxr-x 1 wsadmin logadmin 188110111 Jul 22 01:33 /logs/intlpymt/intlpymtria/Trace.log 652816 160332 -rwxrwxr-x 1 wsadmin logadmin 164011871 Aug 14 2012 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut.log_08142012.gzip 653312 128916 -rwxrwxr-x 1 wsadmin logadmin 131873943 Jul 18 10:49 /logs/websphere/heapdump.20130718.104150.27592.0006.phd.201307181406.lppwa1213.gz 653320 128916 -rwxrwxr-x 1 wsadmin logadmin 131873735 Jul 18 10:40 /logs/websphere/heapdump.20130718.104012.27592.0002.phd.201307181406.lppwa1213.gz 653309 128912 -rwxrwxr-x 1 wsadmin logadmin 131867602 Jul 18 10:46 /logs/websphere/heapdump.20130718.104008.27592.0001.phd.201307181405.lppwa1213.gz 653323 128872 -rwxrwxr-x 1 wsadmin logadmin 131828157 Jul 18 10:41 /logs/websphere/heapdump.20130718.104109.27592.0004.phd.201307181407.lppwa1213.gz 652783 120288 -rwxrwxr-x 1 wsadmin logadmin 123047750 Aug 13 2012 /logs/websphere/wsfpp1lppwa1213omsecureServer/SystemOut.log_0813.2012.gzip bash-3.2$ Show Sample Output
0find /logs -ls -xdev | sort -nrk 7 | head -10 -
Display a list of local shell scripts soft-linked to /usr/local/bin Put local shell scripts to local ~/bin/ directory and soft-link them to /usr/local/bin/ which is in the $PATH variable to run them from anywhere. Show Sample Output
0for AAA in $(find /usr/local/bin -type l); do ls -gG "${AAA}"; done -
When bootstrapping or repairing a node this is a simple way to keep tabs on what a node is actively doing. Show Sample Output
0watch -d 'echo -e "Remaining: `(nodetool netstats | grep " 0%" | wc -l)` \nCurrent: `(nodetool netstats | grep "%" | grep -v " 0%")`"' -
0find . |xargs grep '<html\|<body\|<table' |sed '/~/d;s/:.*//' |sed 's/.*/mv & &.html/' |uniq >run.sh; sh run.sh
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One liner that basically duplicates ssh-copy-id functionality by taking care of most common issues of SSH password-less ssh logins: - missing key on the remote server - braindead permissions *cough* RHEL *cough* Show Sample Output
0cat ~/.ssh/id_rsa.pub | ssh user@hostname 'cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys && chmod 700 ~/.ssh && echo "Host key copied"' -
When you want to know the duration of all your mp3 files in the current working directory this command will tell you based on exif data. Since it relies on exif data it can be used against other files like movies, ogg vorbis etc. also. Useful when you want to know how long it will take to listen to an album or series of lectures. Show Sample Output
0exiftool * | grep '^Duration' | sed 's/^.*[[:space:]]\([0-9]*:[0-9]*:[0-9]*\).*$/\1/g' | awk -F':' '{ H+=$1;M+=$2;S+=$3 } END { printf "%d:%d:%d\n", int(H+int(M/60)),int(M+S/60)%60,S%60 }' -
0openssl x509 -hash -noout in cert.pem
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to set the current time manually Show Sample Output
0timedatectl set-time 'YYYY-MM-DD HH:MM:SS' && hwclock --systohc -
There are two different ways that I would have done this. With the command posted or if you prefer xargs: pip freeze --local | awk -F "=" '{$1}' | xargs pip install -U # But this is a moot point considering the above replaces xargs
0pip freeze --local | awk -F "=" '{print "pip install -U "$1}' | sh -
This will drop you into vim to edit all files that contain your grep string.
0grep -ir 'foo' * | awk '{print $1}' | sed -e 's/://' | xargs vim -
this is funny ;) alias sl="ls" ... is the useful solution, but that's boring ;P and You won't learn to think before You type !
0apt-get install sl; sl -
0firefox http://en.wikipedia.org/wiki/$(date +'%b_%d')
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LC_ALL=C is here to always grep on "differ" whatever your language env. xargs -n 2 to run gvim -d with 2 arguments gvim --nofork to use only one instance of gvim
0LC_ALL=C diff -q dir1 dir2 | grep differ | awk '{ print $2, $4 }' | xargs -n 2 gvim --nofork -d - ‹ First < 447 448 449 450 451 > Last ›
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