Commands using egrep sorted by votes

Commands using egrep (220)

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Equivalent to ifconfig -a in HPUX
This is sample output - yours may be different.
0

netstat -nr|egrep -v "Routing|Interface|lo0"|awk '{print $5}'|sort -u| while read l; do ifconfig $l ; echo " Station Addr: `lanscan -ia|grep "$l "|cut -d ' ' -f 1`" ; done

innominable · 2014-10-31 09:20:46 7
List only X byte files in the current directory

This will list all the files that are a gigabyte or larger in the current working directory. Change the G in the regex to be a M and you'll find all files that are a megabyte up to but not including a gigabyte. Show Sample Output
This is sample output - yours may be different.
```
1.8G	Desktop
4.9G	Documents
3.7G	Google Drive
1.4G	Library
 37G	VirtualBoxVMs
8.7G	src
```
0

du -hs * |egrep -i "^(\s?\d+\.?\d+G)"

krizzo · 2014-12-09 15:23:21 9
Show a config file without comments

This will remove all blank lines and lines that start with # to use for commented ines (irrespective of where the # starts in the line).
This is sample output - yours may be different.
0

egrep -v "^$|^.*#" file

greatp123 · 2015-01-01 18:53:18 14
Show drive names next to their full serial number (and disk info)

This is much easier to parse and do something else with (eg: automagically create ZFS vols) than anything else I've found. It also helps me keep track of which disks are which, for example, when I want to replace a disk, or image headers in different scenarios. Being able to match a disk to the kernels mapping of said drive the disks serial number is very helpful ls -l /dev/disk/by-id Normal `ls` command to list contents of /dev/disk/by-id grep -v "wwn-" Perform an inverse search - that is, only output non-matches to the pattern 'wwn-' egrep "[a-zA-Z]{3}$" A regex grep, looking for three letters and the end of a line (to filter out fluff) sed 's/\.\.\/\.\.\///' Utilize sed (stream editor) to remove all occurrences of "../../" sed -E 's/.*[0-9]{2}:[0-9]{2}\s//' Strip out all user and permission fluff. The -E option lets us use extended (modern) regex notation (larger control set) sed -E 's/->\ //' Strip out ascii arrows "-> " sort -k2 Sort the resulting information alphabetically, on column 2 (the disk letters) awk '{print $2,$1}' Swap the order of the columns so it's easier to read/utilize output from sed 's/\s/\t/' Replace the space between the two columns with a tab character, making the output more friendly For large ZFS pools, this made creating my vdevs immeasurably easy. By keeping track of which disks were in which slot (spreadsheet) via their serial numbers, I was able to then create my vols simply by copying and pasting the full output of the disk (not the letter) and pasting it into my command. Thereby allowing me to know exactly which disk, in which slot, was going into the vdev. Example command below. zpool create tank raidz2 -o ashift=12 ata-... ata-... ata-... ata-... ata-... ata-... Show Sample Output
This is sample output - yours may be different.
```
sda     ata-Samsung_SSD_840_PRO_Series_SERIALSERIAL
sdb     ata-WDC_WD30EFRX-INFOINFOINFO
sdc     ata-WDC_WD30EFRX-INFOINFOINFO
sdd     ata-WDC_WD30EFRX-INFOINFOINFO
sde     ata-WDC_WD30EFRX-INFOINFOINFO
sdf     ata-WDC_WD30EFRX-INFOINFOINFO
```
0

ls -l /dev/disk/by-id |grep -v "wwn-" |egrep "[a-zA-Z]{3}$" |sed 's/\.\.\/\.\.\///' |sed -E 's/.*[0-9]{2}:[0-9]{2}\s//' |sed -E 's/->\ //' |sort -k2 |awk '{print $2,$1}' |sed 's/\s/\t/'

lig0n · 2015-01-25 19:29:40 8
grep for 2 words existing on the same line

grep for 2 words existing on the same line
This is sample output - yours may be different.
0

egrep 'word1.*word2' --color /path/file.log |more

alissonf · 2015-04-28 15:09:45 9

How to capture ICAP headers with tcpdump

Human readable representation of the headers of an ICAP request, using tcpdump Show Sample Output

idodekov · 2015-05-29 12:58:27 9

List widescreen wallpapers in current dir

Checks if the aspect ratio is approximately 1.6 (16:10) or ~1.77777778 (16:9). Requires mpv_identify from mpv project https://github.com/mpv-player/mpv/blob/master/TOOLS/mpv_identify.sh (this replaces mplayer -identify, or midentify) Show Sample Output
This is sample output - yours may be different.
```
video_aspect=1.778646
video_aspect=1.777778
```
0

./mpv_identify.sh * | egrep '^video_aspect=1\.[67]'

Tatsh · 2015-09-29 05:47:07 11
Not able to data in tee on using dual command like: tail and grep
This is sample output - yours may be different.
0

tail -f log.txt | egrep --line-buffered 'WARN|ERROR' | tee filtered_output.txt

zarvis · 2015-09-29 11:12:52 9
checking if an IP is valid.
This is sample output - yours may be different.
0

echo $IP | egrep '^(([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}([0-9]{1,2}|1[0-9][0-9]|2[0-4][0-9]|25[0-5])$'

andregyn62 · 2015-10-19 18:06:32 11
Search for files with non-Unix line endings
This is sample output - yours may be different.
0

egrep -l $'\r'\$ *

swarzynski · 2015-11-19 10:57:47 11
Count relevant lines of shell code in a git repo

Uses git grep for speed, relies on a valid she-bang, ignores leading whitespace when stripping comments and blank lines Show Sample Output
This is sample output - yours may be different.
```
% egrep -v '^\s*($|#)' $(git grep -l '#!/bin/.*sh' *) | wc -l
14079
```
0

egrep -v '^\s*($|#)' $(git grep -l '#!/bin/.*sh' *) | wc -l

Natureshadow · 2016-02-15 11:15:48 15
Erase Logs / Cache
This is sample output - yours may be different.
0

bleachbit -l | egrep 'cache|log' | xargs bleachbit -c

renous · 2016-02-28 15:20:47 12
Btrfs: Find file names with checksum errors

debian kernel 4.4.6 Show Sample Output
This is sample output - yours may be different.
```
images/10000/vm-10000-disk-1.raw
images/8001/BUGBTRFS/vm-8001-disk-2.raw
images/9003/vm-9003-disk-2.raw.crash.btrfs
```
0

grep "checksum error at logical" /var/log/messages | egrep -o "[^ ]+$" | tr -d ')' | sort | uniq

andrefalgon · 2016-04-30 09:13:36 8
Calculate comment density of shell scripts in a directory

Show Sample Output
This is sample output - yours may be different.
```
7882 lines = 7576 sloc [96%] + 306 comments [3%]
```
0

dir=/rom; a=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -cv '^[[:space:]]*#'); b=$(find $dir -name \*.sh -exec cat '{}' \; | egrep -c '^[[:space:]]*#'); echo $((a+b)) lines = ${a} sloc [$((a*100/(a+b)))%] + ${b} comments [$((b*100/(a+b)))%]

koniu · 2016-05-19 08:35:56 86
Extract binary from .text section (shellcode)

Extracts the binary from the .text section and escapes it. This puts it in a form ready to use in a program. Show Sample Output
This is sample output - yours may be different.
```
\x31\xd2\x31\xc9\xbb\xb4\x90\x04\x08\xb0\x05\xcd\x80\xb2\x10\xb9\xc4\x90\x04\x08\x89\xc3\xb0\x03\xcd\x80\x89\xdf\xb2\x10\xb9\xc4\x90\x04\x08\xb3\x01\xb0\x04\xcd\x80\x89\xfb\xb0\x06\xcd\x80\xb0\x01\xcd\x80
```
0

objdump -d -j .text ExeHere | grep -e '^ ' | tr '[[:space:]]' '\n' | egrep '^[[:alnum:]]{2}$' | xargs | sed 's/ /\\x/g' | sed -e 's/^/\\x/g'

keyboardsage · 2016-09-11 07:15:00 16
uncompress file that is compressed multiple times

Abort/Break with CTRL-C when no output is shown anymore (break while true loop). Show Sample Output
This is sample output - yours may be different.
```
bunzip2: Can't guess original name for error.log.0.bz2.0.bz2.0 -- using error.log.0.bz2.0.bz2.0.out
bunzip2: Can't guess original name for error.log.0.bz2.0.bz2.0.out -- using error.log.0.bz2.0.bz2.0.out.out
bunzip2: Can't guess original name for error.log.0.bz2.0.bz2.0.out.out -- using error.log.0.bz2.0.bz2.0.out.out.out
```
0

while true; do for bzipfile in $(file *|egrep bzip2|awk '{print $1'}|cut -d':' -f1); do bunzip2 $bzipfile; done; done

tapestreamer · 2016-12-12 16:12:18 15
Check spelling of word using regex

Runs on at least MacOS Sierra (in Bash) Show Sample Output
This is sample output - yours may be different.
```
compatibility
```
0

egrep "^compat.bility$" /usr/share/dict/words

demonzrulaz · 2017-02-24 05:20:40 17
Print file excluding comments and blank lines
This is sample output - yours may be different.
0

egrep -v '^$|^#' /etc/sysctl.conf

imjoseangel · 2017-04-17 20:23:09 24
Do mathematical operation on every line of a given file for the first value found to be replaced (other lines stay untouched)

The given file may contain any kind of characters. This is compatible for most simple mathematical operation. For the first number found, it will be replaced by the result of a factor operation of 1000. To change the filename or multiplactor or number regular expression, change the first fixed values. Show Sample Output
This is sample output - yours may be different.
```
For a given filename such as test.csv, a new filename new_test.csv will be created containing the new values after the math operation.
command source: cat test.csv
command output: cat new_test.csv
```
0

n=1000;f="test.csv";r='([0-9]+.{0,1}[0-9]*)';echo -n "" > new_${f};cat $f | while read l;do val=`echo $l | egrep -o $r` ; if [ ! -z $val ];then newval=`echo $val \* $n | bc -l`;l=`echo $l | sed "s/$val/$newval/"`;fi;echo $l >> new_${f};unset val;done

s333 · 2017-04-26 18:04:07 19
Cat without comment
This is sample output - yours may be different.
0

cat /etc/squid/squid.conf | egrep -v "(^#.*|^$)"

tofu00 · 2017-11-29 10:16:49 41
check virt is available
This is sample output - yours may be different.
0

egrep -c '(vmx|svm)' /proc/cpuinfo

aysadk · 2017-12-03 22:48:04 22
Sort installed package on ArchLinux from low to high
This is sample output - yours may be different.
0

pacman -Qi | egrep '^(Name|Installed)' | cut -f2 -d':' | paste - - | column -t | sort -nk 2 | grep MiB

tianyu · 2019-04-21 05:19:56 37
InnoDB related parameters
This is sample output - yours may be different.
0

mysqladmin variables | egrep '(innodb_log_file|innodb_data_file)'

shantanuo · 2020-02-19 10:24:52 78
Change Windows line endings to Unix version

https://www.howtogeek.com/771399/how-to-use-the-find-command-in-linux/
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec egrep -l $'\r'\$ {} \; | xargs dos2unix

swarzynski · 2022-08-02 09:28:38 1133
Extract raw URLs from a file
This is sample output - yours may be different.
-1

egrep -ie "<*HREF=(.*?)>" index.html | awk -F\" '{print $2}' | grep ://

wwest4 · 2009-02-05 17:51:14 22
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Make vim open in tabs by default (save to .profile)

I always add this to my .profile rc so I can do things like: "vim *.c" and the files are opened in tabs.

defragment files

Thanks to flatcap for optimizing this command. This command takes advantage of the ext4 filesystem's resistance to fragmentation. By using this command, files that were previously fragmented will be copied / deleted / pasted essentially giving the filesystem another chance at saving the file contiguously. ( unlike FAT / NTFS, the *nix filesystem always try to save a file without fragmenting it ) My command only effects the home directory and only those files with your R/W (read / write ) permissions. There are two issues with this command: 1. it really won't help, it works, but linux doesn't suffer much (if any ) fragmentation and even fragmented files have fast I/O 2. it doesn't discriminate between fragmented and non-fragmented files, so a large ~/ directory with no fragments will take almost as long as an equally sized fragmented ~/ directory The benefits i managed to work into the command: 1. it only defragments files under 16mb, because a large file with fragments isn't as noticeable as a small file that's fragmented, and copy/ delete/ paste of large files would take too long 2. it gives a nice countdown in the terminal so you know how far how much progress is being made and just like other defragmenters you can stop at any time ( use ctrl+c ) 3. fast! i can defrag my ~/ directory in 11 seconds thanks to the ramdrive powering the command's temporary storage bottom line: 1. its only an experiment, safe ( i've used it several times for testing ), but probably not very effective ( unless you somehow have a fragmentation problem on linux ). might be a placebo for recent windows converts looking for a defrag utility on linux and won't accept no for an answer 2. it's my first commandlinefu 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" }

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

Based on capsule8 agent examples, not rigorously tested

Remove any RPMs matching a pattern

This should be an option to rpm, but isn't. I wind up using it a lot because I always forget the full name of the packages I want to delete.

tar+pbzip2 a dir

a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

find the delete file ,which is in use

Kills a process that is locking a file.

Useful when you're trying to unmount a volume and other sticky situations where a rogue process is annoying the hell out of you.

rgrep: recursive grep without .svn

Only excludes .svn from filenames.

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Commands using egrep (220)

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