All commands (13,968)
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0[[ -d "/sys/firmware/efi" ]] && echo "UEFI" || echo "BIOS"
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The sample output is from an Android Device Show Sample Output
0grep -e AnonHugePages /proc/*/smaps | awk '{ if($2>4) print $0} ' | awk -F "/" '{system("cat /proc/" $3 "/cmdline");printf("\n");print $0; printf("\n");}' -
1cat /sys/devices/cpu/caps/pmu_name
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-1git branch -d $( git branch -vv | grep '\[[^:]\+: gone\]' | awk '{print $1}' | xargs )
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0date -s "$(curl -sD - www.example.com | grep '^Date:' | cut -d' ' -f3-6)Z"
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Explanation Firstly the function checks if user gave it any input, and notifies the user if they failed to do so. If user has inputed a search string, the function will call upon youtube-dl to find url of the audio of the first matching youtube video and play that with mpv. Call function by wrapping search string in quotes: listen-to-yt "sultans of swing" You have to paste the line in your .zshrc and source .zshrc for it to work. Limitations The dependancies are youtube-dl and mpv. this oneliner is stolen from http://www.bashoneliners.com/oneliners/302/
1listen-to-yt() { if [[ -z "$1" ]]; then echo "Enter a search string!"; else mpv "$(youtube-dl --default-search 'ytsearch1:' \"$1\" --get-url | tail -1)"; fi } -
google has added 2 more netblocks... Show Sample Output
2for NETBLOCK in $(echo _netblocks.google.com _netblocks2.google.com _netblocks3.google.com); do nslookup -q=TXT $NETBLOCK ; done | tr " " "\n" | grep ^ip[46]: | cut -d: -f2- | sort -
Works for debian and ubuntu based distros. Show Sample Output
1apt list --upgradable | grep -v 'Listing...' | cut -d/ -f1 | tr '\r\n' ' ' | sed '$s/ $/\n/' -
The number 5 means to replace the leading and trailing 5 characters of an "@" in a log file with XXXX@XXXXX.
-2%s/.\{5\}@.\{5\}/XXXXX@XXXXXX/g -
1curl -s https://api.github.com/users/<username>/repos?per_page=1000 | grep -oP '(?<="git_url": ").*(?="\,)'
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2ss -plunt
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This assumes you are in the cwd of where you put your s3 scripts. Its useful if someone decides to create aws cloudformation scripts and doesn't add the 'yaml' or .yml extension. Show Sample Output
1rg -l "AWSTemplateFormatVersion: '2010-09-09'" * -
Python is installed on many boxes (in case you could not afford installing jq).
0curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | python <(echo "import json,sys;v=json.load(sys.stdin);for i in v:; print(i['git_url']);" | tr ';' '\n') -
in case you could afford installing jq
1curl -s "https://api.github.com/users/<username>/repos?per_page=1000" | jq '.[].git_url' -
Using the csv tool `miller` you can transform a csv file into a json array of objects, where the properties are the values of the csv header line and the values are the values of the subsequent lines. Show Sample Output
1mlr --c2j --jlistwrap cat file.csv -
http://alvinalexander.com/linux/unix-linux-process-memory-sort-ps-command-cpu for an overview of --sort available values
2watch -n1 "ps aux --sort=-%mem,-%cpu | head -n 50" -
Use flag "--" to stop switch parsing Show Sample Output
0grep -- - -
13curl -s https://api.github.com/users/<username>/repos?per_page=1000 |grep git_url |awk '{print $2}'| sed 's/"\(.*\)",/\1/'
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Shell function which takes a bash command as its input, and displays the following formatted output: EXAMPLE: command OUTPUT: output from command Show Sample Output
8example() { echo "EXAMPLE:"; echo; echo " $@"; echo; echo "OUTPUT:"; echo ; eval "$@" | sed 's/^/ /'; } -
Measure the cpu performance: In-case if the cpu is thermal throttling then you can find it using this command. Check the first line of the output. Example: Doing md5 for 3s on 16 size blocks: 11406892 md5's in 2.98s ? #(When cpu is not throttling) Doing md5 for 3s on 16 size blocks: 110692 md5's in 2.98s ?? #(When cpu is thermal throttling) Practical use case: Once we had cooling outage in data center which caused thermal throttling in some of the worker nodes. We used this tool to prove that some servers are not performing well because of the cpu thermal throttling. Show Sample Output
8openssl speed md5 -
Click window to change its opacity. Source: https://unix.stackexchange.com/a/494289
1xprop -format _NET_WM_WINDOW_OPACITY 32c -set _NET_WM_WINDOW_OPACITY 0x7FFFFFFF -
This command first determines whether a second screen is connected. If this is the case, it sets the screen's RGB gamma via xrandr. Useful for cheap or slightly defective monitors with a tint. In this example a yellowing/champagne color deviation is compensated for by decreasing the red and the green portion of the image.
1secondscreen=$(xrandr -q | grep " connected" | sed -n '2 p' | cut -f 1 -d ' '); [ "$secondscreen" ] && xrandr --output $secondscreen --gamma 0.6:0.75:1 -
Change the file extension in batch. Useful to create output file names with same input name but distinct extension by including logic inside the loop
2for file in *.txt; do mv "$file" "${file%.txt}.xml"; done -
5find /glftpd/site/archive -type f|grep '([0-9]\{1,9\})\.[^.]\+$'|parallel -n1 -j200% md5sum ::: |awk 'x[$1]++ { print $2 " :::"}'|sed 's/^/Dupe: /g'|sed 's,Dupe,\x1B[31m&\x1B[0m,'
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I find the other timers are inaccurate. It takes some microseconds to perform the date function. Therefore, using date/time math to calculate the time for us results in millisecond accuracy. This is tailored to the BusyBox date function. May need to change things around for GNU date function. Show Sample Output
-1let T=$(date +%s)+3*60;while [ $(date +%s) -le $T ]; do let i=$T-$(date +%s); echo -ne "\r$(date -d"0:0:$i" +%H:%M:%S)"; sleep 0.3; done - 1 2 3 > Last ›
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