If you work regularly on a Solaris or systems which do not have the “-r” (recursive grep) for grep, then you know what a lifesaver this command can be.
Here is one from command line fu:
find . -type f -exec awk '/linux/ { printf "%s %s: %s\n", FILENAME, NR, $0; }' {} \;
The benefit of using awk here is that you can print the line number also 🙂
Continue readingI was working on some scripts and the changes that I was making in the scripts was very dynamic, which I did want to keep backing up in the version control system. But for the peace of my mind, I wanted to keep a copy of the scripts, whenever it was in working state.
Since I had multiple files, so it would make more sense to have a script that could copy all the files in the current directory to “old” directory without over-writing the existing files. So, I wrote a script that would postfix the files with a number. With this approach, finally what I had was the following:
Continue readingHere is one of the scripts that I found on the net while searching for something … Note the URL for the script in the Description.
#!/bin/bash - #=============================================================================== # # FILE: linux_hw.sh # # USAGE: ./linux_hw.sh # # DESCRIPTION: http://www.howtogeek.com/howto/solaris/get-the-processor-type-on-solaris/ # # OPTIONS: --- # REQUIREMENTS: --- # BUGS: --- # NOTES: --- # AUTHOR: Amit Agarwal (aka), amit.agarwal@roamware.com # COMPANY: Roamware India Pvt Ltd # CREATED: 09/13/2011 03:57:34 PM IST # Last modified: Sun Oct 30, 2011 04:59PM # REVISION: --- #=============================================================================== function linux_hw_CPU { typeset num=0 typeset name="" typeset cores="" name="$( cat /proc/cpuinfo | awk -F: ' /vendor_id/ { vendor=$2 } /model name/ { model=$2 } /cpu MHz/ { if( model ~ "Hz" ) {speed=""} else { speed=$2? MHz" }; print vendor, model, speed; } ' | tail -1 )" num=$(if [ -r /proc/vmware/cpuinfo ]; then awk '/pcpu/ { print NF-1 }' /proc/vmware/cpuinfo; else cat /proc/cpuinfo | grep processor| wc -l; fi) # ESX: mas info sobre logical/cores/packages if [ -r /proc/vmware/sched/ncpus ] then cores=$( echo $( cat /proc/vmware/sched/ncpus ) ) fi echo $num $( echo "$name ($cores)" | enclose ) } function enclose { tr -s " " | sed -e "s/^/\"/; s/$/\"/; s/\"\ /\"/; s/\ \"/\"/" } function linux_hw_CPU { typeset num=0 typeset name="" typeset cores="" name="$( cat /proc/cpuinfo | awk -F: ' /vendor_id/ { vendor=$2 } /model name/ { model=$2 } /cpu MHz/ { if( model ~ "Hz" ) {speed=""} else { speed=$2" MHz" }; print vendor, model, speed; } ' | tail -1 )" num=$( if [ -r /proc/vmware/cpuinfo ] then awk '/pcpu/ { print NF-1 }' /proc/vmware/cpuinfo else cat /proc/cpuinfo | grep processor| wc -l fi ) if grep -q "physical id" /proc/cpuinfo || grep "siblings" /proc/cpuinfo then chip_count=$( grep "physical id" /proc/cpuinfo | sort -u | wc -l ) chip_core=$( grep "siblings" /proc/cpuinfo | tail -1 | cut -d: -f2 ) cores="($chip_count chips x $chip_core cores)" fi # Blades HP con if [ -x /sbin/hpasmcli ] then chip_name=$( /sbin/hpasmcli -s "SHOW SERVER" | grep "Name" | head -1 | cut -d: -f2 ) chip_speed=$( /sbin/hpasmcli -s "SHOW SERVER" | grep "Speed" | head -1 | cut -d: -f2 ) chip_core=$( /sbin/hpasmcli -s "SHOW SERVER" | grep "Core" | head -1 | cut -d: -f2 ) fi # ESX: mas info sobre logical/cores/packages if [ -r /proc/vmware/sched/ncpus ] then cores="($( echo $( cat /proc/vmware/sched/ncpus ) ))" fi # Linux Itanium IA64 if grep -q -i itanium /proc/cpuinfo then name="$( grep "vendor" /proc/cpuinfo | cut -d: -f2- | tail -1 ) $( grep "arch " /proc/cpuinfo | cut -d: -f2- | tail -1 ) $( grep "family" /proc/cpuinfo | cut -d: -f2- | tail -1 ) $( grep "cpu MHz" /proc/cpuinfo | cut -d: -f2- | cut -d. -f1 | tail -1 ) Mhz" chip_count=$( grep "physical id" /proc/cpuinfo | sort -u | wc -l ) chip_core=$( grep "siblings" /proc/cpuinfo | tail -1 | cut -d: -f2 ) cores="($chip_count chips x $chip_core cores)" fi echo $num $( echo "$name $cores" | enclose ) } linux_hw_CPU
If you are working on recent versions of the *nix OS like Fedora or Ubuntu then you would know about the commad ssh-copy-id. But if you land up using one of the older versions like Solaris or something where the command is not present, then probably you need a simpler solution to this. One of the simplest solution is with a lot of assumtions, simply copy the id_rsa file to remote server and hope it works. And here is a script to do just that:
Continue readingQuick tip, you can use any expression for the sed commands in the (). With this trick you can redirect the stdout of 2 commands to the diff command. This might become very useful, if you want to compare 2 files, excluding the first line.
diff <(sed '1d' file) <(sed '1d' file2)
More interesting example is where the string ABC is converted to abc before comparing in the second file with the following command:
Continue readingLast time we got ourselves some conkyrc files from the ubuntu forums. But that scripts gets the files only from the First page of the thread. Lets extend this further and get the script to get all the conkyrc files.
There are some 1048 pages in the thread, I am showing pages 1 to 3 but you can change 3 to whatever number you want 🙂
count=0
for i in {1..3}
do
>.test
>conkyrc
echo "Getting page $i"
curl http://ubuntuforums.org/showthread.php?t=281865\&page=$i |\\
sed -n '// d'|\
sed 's##\n-----------------------------------\n\n\n#' \
>conkyrc
dos2unix conkyrc
cp conkyrc .test
while [ $(wc -l .test|sed 's/[^0-9]//g') != 0 ]
do
sed -n '1,/------------------------/ p' .test|sed '$d' >conkyrc.$count
diff .test conkyrc.$count |sed 's/^<.//'|sed '1, /---------------------/ d;2d'>.test
((count++))
done
echo "Files so far are : $count"
done
Continuing from where we left, here is a script that can do all this for you 🙂
curl http://ubuntuforums.org/showthread.php?t=281865\&page=$i | sed -n '/\\/pr/ p'| sed '// d'| sed 's##\n-----------------------------------\n\n\n#' >conkyrc dos2unix conkyrc cp conkyrc .test while [ $(wc -l .test|sed 's/[^0-9]//g') != 0 ] do sed -n '1,/------------------------/ p' .test|sed '$d' >conkyrc.$count diff .test conkyrc.$count |sed 's/^<.//'|sed '1, /---------------------/ d;2d'>.test ((count++)) done
This will create couple of conkyrc.files in the current directory. Each of these is one from the web-page that I mentioned earlier. So, enjoy….
Continue reading