Below you'll find a collection of bash one liner examples, some short and some very long :D.
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02 Jul 2008, ShoKo
dd bs=1M if=/dev/cciss/c0d0 | gzip -1 | ssh 10.10.10.5 'gunzip | dd bs=1M of=/dev/cciss/c0d0'while true; do killall -USR1 dd; sleep 10; done (and check the original console)
25 Mar 2008, ShoKo
j=0; d=( '/' '-' '\' '|' ); i=0; while true; do echo -en "${d[j++%4]}^[[D"; ping google.com -W 1 -c 1 &> /dev/null && i=0 || echo -ne "$((++i))" > /dev/null; [ $i == 5 ] && i=0 && echo -e "`date` -- LINK DOWN" && ./internet &> /dev/null; sleep 0.5; done
25 Mar 2008, ShoKo
d='-/|\' ; while (( t+=1 )); do echo -ne "\b${d:t%4:1}"; sleep 0.25; done
06 Apr 2007, ShoKo
ssh 10.200.1.180 "tar -c -f - /var/twiki | gzip -" > /var/backup/twiki.back.`date +%Y%m%d`.tgz
17 Mar 2007, ShoKo
dd if=/dev/hda of=mbr.bin bs=512 count=1; od -xa mbr.bin;dd if=/dev/sda bs=512 count=1 | od -xa
16 Jan 2007, ShoKo
ls -d /proc/*/root | xargs -n1 readlink | grep -Fxv / | sort | uniq
03 Jan 2007, ShoKo
echo drwxr-x--- | tr "rwx" 1 | tr "-" 0 | sed "s#^.##" | while read -n 3 a; do echo "ibase=2; $a" | bc; done | xargs | sed "s# ##g"
03 Jan 2007, ShoKo
ls -lad `find /var/hobbit/` | awk '{print "chown "$3"."$4" "$9}'
find /var/hobbit/ -printf 'chown %u.%g "%p"\n'
06 Dec 2006, ShoKo
(sleep 2; echo "username^M"; sleep 2; echo 'pasword^M'; sleep 2; echo "command1^M" sleep 2; echo "command2^M") | telnet 1.2.3.4The ^M are enters ('ctrl-v + enter' when you type it in shell).
06 Dec 2006, ShoKo
(sleep 1; echo "select table_name from user_tables;"; sleep 1; echo "quit";) | sqlplus mozes/******@mozes
02 Dec 2006, ShoKo
ssh ptsl656 "df -lh | sort -t a -k 2 -n; free -m"
02 Dec 2006, ShoKo
PROMPT_COMMAND='echo -ne "\033]0;${HOSTNAME//.*} ${USER} ${PWD} \007"'
27 Aug 2008, ShoKo
for lin in `echo "SHOW MASTER STATUS\G" | mysql 2>/dev/null | sed "1d; s#: #='#; s#^ *##; s# #_#g; s#\\\$#'#;"`; do eval $lin ; doneecho $Position)
25 Mar 2008, ShoKo
ionice -c3 nice -n 19 mysqldump -A -R --skip-opt --add-drop-table --add-locks --create-options --disable-keys --extended-insert --single-transaction --quick --set-charset | nice -n 19 gzip -3 > /var/mysql_dump.gzapt-get install schedutils
13 Feb 2008, ShoKo
/usr/local/mysql/bin/mysqldump -p<password> -R --opt -e -B <database>
13 Feb 2008, ShoKo
for i in `echo "show tables" | mysql <database> | sed "1d"`; do c=`echo "select count(*) from $i" | mysql <database> | sed "s#(.*)##; 1d"`; printf "%-16s %s\n" $i $c; done
18 Jan 2007, ShoKo
/usr/local/mysql/bin/mysqldump -A -p<password> -R --opt -e
20 Oct 2008, ShoKo
date -d "1970-01-01 1184521826 sec GMT"
04 Jan 2007, ShoKo
/usr/local/bin/perl -e "use Time::ParseDate; print scalar(localtime(parsedate(scalar(localtime($NOW)))-(60*24*60*60)))";
16 Jan 2007, ShoKo
/usr/local/bin/perl "print scalar localtime time - 5*86400;"
27 Dec 2006, ShoKo
echo $((`date +%s`-35*24*60*60)) | awk '{print strftime("%c",$1)}'
06 Dec 2006, ShoKo
date +%G%m%d%H%M%S
06 Dec 2006, ShoKo
cat /u01/app/oracle/product/9.2.0/network/admin/tnsnames.ora | sed -n "/^$/{ :a; N; s#10\.0#10\.0#; T a; s#\n# #g; s#^ \([^ ]*\).*\(10.0.0.[0-9]*\).*#\1=\2#; p;}"input file:
# TNSNAMES.ORA Network Configuration File: /u01/app/oracle/product/9.2.0/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.
MOZES =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.10)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = mozes)
)
)
MOZES2 =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 10.0.0.18)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = mozes)
)
)
10 Mar 2008, IlyaSher
curl 'https://api.clickatell.com/http/sendmsg?api_id=FILL&user=FILL&password=FILL&to=FILL_PHONE&text=FILL_TEXT
06 Dec 2006, ShoKo
awk '{ x[$1]++; } END { for(k in x) {print x[k] " " k} }' var/log/httpd/access_log | sort -n | tail -10
06 Dec 2006, ShoKo
ifconfig -a | grep "inet addr" | sed "s#[^:]*:\([^ ]*\).*#\1#" | grep -v 127.0.0.1 | xargs
06 Dec 2006, ShoKo
ifs=$IFS; IFS='$'; sed "1d" nodes | while read -a w; do echo ${w[0]} ${w[4]} ${w[20]}; done;
06 Dec 2006, ShoKo
head -1 nodes | tr "$" "\n" | cat -n
28 Sep 2008, ShoKo
tar zvf - --one-file-system --preserve --exclude="LogAnalysisInfo" --exclude="mysql.prod" --create / /tmp /var /var/log | ssh 1.1.1.1 "cat > /var/backup.mg1.tgz"
02 Dec 2006, ShoKo
rm f-sec.tar; rpm -q --filesbypkg f-secure-ssh-server-3.3.2-21.sles9 | awk '$2 !~ /\/usr\/share\/|rc\.d/ {print $2}' | xargs /usr/intel/bin/gtar rvf f-sec.tar
02 Dec 2006, ShoKo
for file in `tar tf f-sec.tar`; do [ -e "/$file" ] && echo "EXIST: /$file"; done
25 Oct 2008, ShoKo
vimdiff <(find /var/www/ | sort) <(ssh remote "find /var/www/" | sort)
27 Aug 2008, ShoKo
find /etc/ -type f -mtime -x -exec rm {} \;
27 Aug 2008, ShoKo
[ $((`/bin/date +%s`-`/usr/bin/stat -c "%Y" /file`)) -ge 20 ] && ls -la /etc/
24 Oct 2008, ShoKo
memstat -w | egrep "`ps awux | grep apache | grep -v grep | awk '{print $2}' | xargs | tr ' ' '|'`" | awk '{gsub("k:",""); sum+= $1}; END {print sum"k"}'
25 Mar 2008, ShoKo
25 Mar 2008, ShoKo
02 Dec 2006, ShoKo
while true; do echo; /usr/intel/bin/gtime -v ls -laR ~/ >/dev/null; for ((i=5;i--;i>0)); do echo -n "."; sleep 1; done; done
Feel free to send me interesting one liners to shokoe at gmail
and I'll add it to this page 
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