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Truncate long strings in columns and use custom header names
$ column -s: -t -n . -N USERNAME,PASS,UID,GID,NAME,HOMEDIR,SHELL -T NAME /etc/passwd|sed "1,2 i $(printf %80s|tr ' ' '=')" Using the --table-truncate ( -T ) option, you can specify the columns you will...
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currently mounted filesystems in nice layout
$ mount | column -t Particularly useful if you're mounting different drives, using the following command will allow you to see all the filesystems currently mounted on your computer and their...
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drop first column of output by piping to this
$ perl -pE's/(\S+\s*){0,1}//' An advantage is that this doesn't modify remained string at all. One can change {0,1} with {0,n} to drop several columns View this command to comment, vote or add to...
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A simple function to conveniently extract columns from an input stream
$ col() { awk '{print $('$(echo $* | sed -e s/-/NF-/g -e 's/ /),$(/g')')}'; } Something I do a lot is extract columns from some input where cut is not suitable because the columns are separated by not...
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Use wbinfo to output a table with basic user information from the default...
$ for DOMAIN in $(wbinfo -m); do WBSEP=$(wbinfo --separator); ADSERVER=$(wbinfo ... (Read description for full command))) ### for ADUSER in $(wbinfo -u --domain="$(wbinfo --own-domain)" | sort); do...
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Extract shortcuts and hostnames from .ssh/config
$ awk '$1=="Host"{$1="";H=substr($0,2)};$1=="HostName"{print H,"$",$2}' ~/.ssh/config | column -s '$' -t Spits out table that shows your Host->HostName aliases in ~/.ssh/config View this command to...
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Show complete URL in netstat output
$ netstat -pnut -W | column -t -s $'\t' This takes all of the tab spaces, and uses column to put them into the appropriately sized table. View this command to comment, vote or add to favourites View...
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Print ASCII Character Chart
$ for i in {1..256};do p=" $i";echo -e "${p: -3} \\0$(($i/64*100+$i%64/8*10+$i%8))";done|cat -t|column -c120 Prints out an ascii chart using builtin bash! Then formats using cat -t and column. The best...
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Show complete URL in netstat output
$ netstat -tup -W | column -t The -W switch of netstat makes it print complete URL of the connections, which otherwise by default is truncated to fit its default column size. Now to compensate for...
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Select columns in a file
$ cut -d: -f 1 names.txt Display the 1st field (employee name) from a colon delimited file View this command to comment, vote or add to favourites View all commands by ankush108 by David Winterbottom...
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Check your unread Gmail from the command line
$ curl -u username --silent "https://mail.google.com/mail/feed/atom" | awk 'BEGIN{FS="\n";RS="(</entry>\n)?<entry>"}NR!=1{print "\033[1;31m"$9"\033[0;32m...
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Print all lines from a file that has the same N th and M th column
$ awk '$3==$4' /etc/passwd View this command to comment, vote or add to favourites View all commands by totti by David Winterbottom (codeinthehole.com)
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format txt as table not joining empty columns adding header with column numbers
$ cat file.csv | perl -pe 'if($. == 1) {@h = split(/;/); $i = 1 ; map { $_ = $i; $i++ } @h; print join(" ;", @h) , "\n"} ; s/(^|;);/$1 ;/g' | column -ts\; | less -S This version now adds a header with...
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format txt as table not joining empty columns
$ column -tns: /etc/passwd -n switch keeps empty columns If your distribution does not ship with a recent column version that supports -n you can use this alternative: perl -pe 's/(^|;);/$1 ;/g'...
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format txt as table
$ cat /etc/passwd | column -nts: View this command to comment, vote or add to favourites View all commands by kev by David Winterbottom (codeinthehole.com)
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Show numerical values for each of the 256 colors in bash
$ for i in {0..255}; do echo -e "\e[38;05;${i}m${i}"; done | column -c 80 -s ' '; echo -e "\e[m" I like the other three versions but one uses nested loops and another prints every color on a separate...
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STAT Function showing ALL info, stat options, and descriptions
$ statt(){ C=c;stat --h|sed '/Th/,/NO/!d;/%/!d'|while read l;do p=${l/% */};[ $p == %Z ]&&C=fc&&echo ^FS:^;echo "`stat -$C $p \"$1\"` ^$p^${l#%* }";done|column -ts^; } This shows every...
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Advanced LS Output using Find for Formatted/Sortable File Stat info
$ find $PWD -maxdepth 1 -printf '%.5m %10M %#9u:%-9g %#5U:%-5G [%AD | %TD | %CD] [%Y] %p\n' I love this function because it tells me everything I want to know about files, more than stat, more than ls....
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View advanced Sort options, Quick Reference Help Alias
$ alias sorth='sort --help|sed -n "/^ *-[^-]/s/^ *\(-[^ ]* -[^ ]*\) *\(.*\)/\1:\2/p"|column -ts":"' Once you get into advanced/optimized scripts, functions, or cli usage, you will use the sort command...
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View all date formats, Quick Reference Help Alias
$ alias dateh='date --help|sed -n "/^ *%%/,/^ *%Z/p"|while read l;do F=${l/% */}; date +%$F:"|'"'"'${F//%n/ }'"'"'|${l#* }";done|sed "s/\ *|\ */|/g" |column -s "|" -t' If you have used bash for any...
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