tag:blogger.com,1999:blog-184282942012-01-28T02:35:37.196-08:00<b>"What can a one liner do for you?" </b> - Frankly SpeakingFranknoreply@blogger.comBlogger271100tag:blogger.com,1999:blog-18428294.post-89552187068786329142007-11-05T19:06:00.000-08:002007-11-05T19:11:42.887-08:00

To see whether to use the \D or \E display option in mdb: You can run nm and see whether the variable is 4 or 8 bytes. If it's 8 bytes (64 bit) then you need to use /E otherwise /D.-bash-3.00$ /usr/ccs/bin/nm /dev/ksyms |grep maxpgio[23962] | 25553712| 8|OBJT |GLOB |0 |ABS |maxpgioIn the above example the third column tells us that this maxpgio is 8 byte object therefore we

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1155073724046224422006-08-08T14:48:00.000-07:002006-08-08T14:48:44.060-07:00

Check disk space (requires bssh)sudo bssh `cat dbs | tr '\n' ','` 'df -h' > logs/disk_report.080806

Franknoreply@blogger.com1tag:blogger.com,1999:blog-18428294.post-1153684466165182062006-07-23T12:45:00.000-07:002006-07-23T12:54:26.176-07:00

Unix system administrators often need to switch and move jobs from foreground to background and vice versa. [32] To stop (not kill) a currently running job and return to shell, you can use Ctrl-z. [33] Then to view the stopped jobs during the current sessionjobs[34] To kill a stopped job number 2kill -9 %2[35] Check the status of processes in all sessions running by user franklyps -u frankly[36]

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1153098234062473552006-07-16T18:02:00.000-07:002006-07-16T18:03:54.080-07:00

The following command will allow you to copy MySQL tables between different hosts mysqldump -h ip -uuser -ppass from_db from_table | mysql -uuser -ppass target_db

Franknoreply@blogger.com1tag:blogger.com,1999:blog-18428294.post-1150727480322617722006-06-19T07:27:00.000-07:002006-06-19T07:33:03.496-07:00

cat /lists/dbs | while read i ; do echo $i; /path/to/mysql -h $i -e "SHOW variables like 'old%'"; doneThis programming one liner allows you to run a command on multiple MySQL hosts. To use this command, simply create a file dbs with all the MySQL hosts (one per line). The sample command prints the value of whether the database is using old passwords.

Franknoreply@blogger.com2tag:blogger.com,1999:blog-18428294.post-1142062505467628262006-03-10T23:33:00.000-08:002006-03-10T23:35:05.476-08:00

If you get an error message saying "HTTPD dead but PID exists", your disk space is either full or all IPCS semaphores have been used up.ipcs -s | awk ' $3 == "apache" {print $2, $3}' | awk '{ print $1}' | while read i; do ipcrm sem $i; doneClean up ipcs semaphores

Franknoreply@blogger.com2tag:blogger.com,1999:blog-18428294.post-1141968456602450572006-03-09T21:27:00.000-08:002006-03-09T21:27:36.873-08:00

I found this great implementation to remove blank (empty lines) from a string at PHP web site.function removeEmptyLines($string){ return preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $string);}

Franknoreply@blogger.com19tag:blogger.com,1999:blog-18428294.post-1138128390608777952006-01-24T10:46:00.000-08:002006-01-24T10:46:48.330-08:00

Clean a string for filename`echo "$clean" | tr A-Z a-z | tr "[]()&~@#$%^&*()_+=;:,.!' " "-" `;This programming one liner allows you to clean the unwanted characters in a string. The list of characters is specified as the first parameter to the tr command. Programming "One Liner" lookup terms:str_replace trUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would

Franknoreply@blogger.com5tag:blogger.com,1999:blog-18428294.post-1132174476505474252005-11-16T12:49:00.000-08:002005-11-16T12:54:36.636-08:00

fr - find and replace text utility############################################################# Find and Replace Script by Frank Mash #############################################################--> Usage: /sbin/fr [filename] [search] [replace] [b] [i]--> ################# EXAMPLES #############################--> EXAMPLE 1: Find 'Apples' and Replace with 'Oranges'. Create a backup

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1131899871720742312005-11-13T08:37:00.000-08:002005-11-13T08:37:51.770-08:00

AWKawk '/PATTERN/ {print "PATTERN FOUND"}' /var/awk_programming_testThis programming one liner allows you to search for PATTERN in awk_programming_test file. Once the pattern is found, the print statement is invoked . AWK - Delete second columnProgramming One Liner 26awk ' BEGIN{FS=",";} { $2= ""; print}' /var/awk_programming_testThis programming one liner allows you to delete the second field in

Franknoreply@blogger.com1tag:blogger.com,1999:blog-18428294.post-1131898622388534342005-11-13T08:13:00.000-08:002005-11-13T08:17:02.493-08:00

GCC: Finding the GCC Versiongcc --versionThis programming one liner allows you to find which version of gcc (compiler) is installed on your linux server. Programming "One Liner" lookup terms:gccUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like more information on any of the commands, please feel free to contact me with your programming questions.

Franknoreply@blogger.com2tag:blogger.com,1999:blog-18428294.post-1131897951636453962005-11-13T08:00:00.000-08:002005-11-13T08:05:51.656-08:00

Signal Namesfuser -l This programming one liner allows you to output signal names using fuser. Linux signal names are displayed as follows[root@plain docs]# fuser -lHUP INT QUIT ILL TRAP ABRT IOT BUS FPE KILL USR1 SEGV USR2 PIPE ALRM TERMSTKFLT CHLD CONT STOP TSTP TTIN TTOU URG XCPU XFSZ VTALRM PROF WINCH IO PWR SYSUNUSEDProgramming "One Liner" lookup terms:fuserUSE THIS PROGRAMMING ONE LINER AT

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130939273529777612005-11-02T05:23:00.000-08:002005-11-02T05:50:17.706-08:00

Gunzipgunzip site*.gzThis programming one liner allows you to unzip / gunzip all files beginning with site and ending with .gz within the current directory Programming "One Liner" lookup terms:gunzip gzipUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like more information on any of the commands, please feel free to contact me with your programming

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130738110838250522005-10-30T21:54:00.000-08:002005-10-30T21:55:10.946-08:00

Unneeded open ports can be costly for your business!If you have unneeded and unexplained ports open on your server, you are calling for trouble.nmap -p 1-65535 localhostThis programming one liner allows you to look for all open ports (ports that are currently listening) on your Linux server. Programming "One Liner" lookup terms:nmap fuserOutput of running the above command will produce something

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130706106970718222005-10-30T12:57:00.000-08:002005-10-30T13:13:15.973-08:00

Monitoring /var/log/messages date >> /user/security/ssh-intruders.log ; cat /var/log/messages* | grep -i "sshd.*authentication failure" | sort | awk '{FS="rhost="; print $2}' | awk '{FS="user="; print $1}' | grep ".*\..*\." | grep -v "knownhost.com" | grep -v "knownhost2.com" | sort | uniq | while read i; do counter=`grep -i "$i" /var/log/messages* | wc -l` ; echo "$counter attempts by $i";

Franknoreply@blogger.com9tag:blogger.com,1999:blog-18428294.post-1130647817311470372005-10-29T21:49:00.000-07:002005-10-29T21:50:17.363-07:00

Get information about a RPM[root@plain home]# rpm -qip gnome-desktop-2.2.2-2.2E.src.rpmName : gnome-desktop Relocations: (not relocatable)Version : 2.2.2 Vendor: Red Hat, Inc.Release : 2.2E Build Date: Wed 20 Jul 2005 04:12:27 PM CDTInstall Date: (not installed) Build Host: crowe.devel.redhat.comGroup

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130647553565499902005-10-29T21:43:00.000-07:002005-10-29T21:45:53.566-07:00

Broadcasting a messagewallThis programming one liner allows you to everyone connected to a terminal. Simply type wall, enter the message and press Ctrl-d to send it. [root@plain user]# wallfixedBroadcast message from root (pts/0) (Sat Oct 29 22:52:36 2005):fixedProgramming "One Liner" lookup terms:wallUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like

Franknoreply@blogger.com1tag:blogger.com,1999:blog-18428294.post-1130615181819053992005-10-29T12:43:00.000-07:002005-10-29T12:47:35.506-07:00

tar - working with tarballstar -Wcvf /user/backups/site6-fst.tar etc home var >/designerz/backups/log.site6.fst.bkThis programming one liner allows you to create a verified archive. The command generates all files processed to the screen. Programming "One Liner" lookup terms:tar USE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like more information on

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130614779890896712005-10-29T12:33:00.000-07:002005-10-29T12:40:05.486-07:00

ps - process informationps 316For a currently running process, you can use ps with the process id (pid) to see information about the process and to verify that its still running. Programming "One Liner" lookup terms:psProgramming One Liner 13 See all processing currently running (started by you)[root@plain html]# ps PID TTY TIME CMD20056 pts/5 00:00:05 bash 316 pts/5 00:07:53

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130613053623839832005-10-29T12:06:00.000-07:002005-10-29T12:14:14.890-07:00

Using rsync to restoring directories between two drivesrsync -vrplogDtH /olda/dir /home/dirThis programming one liner allows you to restore / copy files from one hard drive to another. This can be useful in cases when you have a hacked hard drive as slave attached to your web server and now you want to restore files. Programming "One Liner" lookup terms:rsync rcpBrief explanation of options used

Franknoreply@blogger.com1tag:blogger.com,1999:blog-18428294.post-1130603439980653492005-10-29T09:11:00.000-07:002005-10-29T09:30:40.196-07:00

Contents of a directoryThis programming one liner allows you to see what files and directories are available within a folder on your Linux web server. Upon invocation of this one liner, the contents of your current directory (pwd) will be displayed. lsIf you believe your ls binary is corrupt (due to a server hack) or just to use an alternate command, you can use the following command on Linux

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130602221073930682005-10-29T09:06:00.000-07:002005-10-29T09:10:26.140-07:00

Directory Disk Usagedu -h -s site6-www.tar.defunctThis programming one liner allows you to view total disk used by a folder or file on a server in a summarized and readable format. Programming "One Liner" lookup terms:df duUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like more information on any of the commands, please feel free to contact me with

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130598738073702732005-10-29T08:09:00.000-07:002005-10-29T08:24:16.010-07:00

Removing a directory on serverrm -r -f /tmp/directoryThis programming one liner allows you to recursively, completely and forcefully remove the directory.Programming "One Liner" lookup terms: rm unlink USE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.If you would like more information on any of the commands, please feel free to contact me with your programming

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130598027811462792005-10-29T07:53:00.000-07:002005-10-29T08:00:27.833-07:00

Dear reader,If you would like more information on any of the programming commands on this site, or need help with your programming projects, please feel free to contact me by posting a comment on any of these post. I will help you understand any one liner in complete detail to help increase your productivity and programming knowledge for a very economical fee. In addition, if you have any general

Franknoreply@blogger.com4tag:blogger.com,1999:blog-18428294.post-1130596927714268622005-10-29T07:34:00.000-07:002005-10-29T08:03:50.106-07:00

Server directory backupcd /user/backups; ls -1 /oldb2/home/virtual/ | grep site | grep -v '-' | while read i; do bkdir=/oldb2/home/virtual/$i; echo $i; echo $bkdir; tar -cf $i-www.tar $bkdir/fst/var/www; echo "Gunzip $i"; gzip $i-www.tar; ls -l $i-www.tar.gz; doneThis programming one liner allows you to backup directories. First it makes a tarball of a directory and then uses gzip to compress

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130595675840806472005-10-29T07:17:00.000-07:002005-10-29T07:29:11.530-07:00

df -hThis programming one liner allows you to view disk usage in human readable formatProgramming "One Liner" lookup terms:man dfUSE THIS PROGRAMMING ONE LINER AT OWN RISK AS AUTHOR CLAIMS NO RESPONSIBILITY.For more information on this one liner programming code, lookup the programming terms displayed above, visit my Linux and network security blog, external programming blogs on Technorati, or

Franknoreply@blogger.com0tag:blogger.com,1999:blog-18428294.post-1130591559308322482005-10-29T06:06:00.000-07:002005-10-29T06:12:39.316-07:00

I have been addicted to programming one liners ever since I first discovered them. Sometimes I find myself writing more than 200 one liners in a day. To keep a record of these one liners I started this blog. If you are passionate about one liners, I invite you to join my blog. Simply post a comment to any post on this programming one liners blog and I will respond promptly. Please provide a

Franknoreply@blogger.com0