IT Wiki - shell

acl

Anonymous (anonymous@undisclosed.example.com) — 2017-12-09T00:19:33+00:00

Home tmade.de Home Wiki User Rights (ACL) See also on:

chmod

Anonymous (anonymous@undisclosed.example.com) — 2024-01-28T23:37:13+00:00

Home tmade.de Home Wiki permission chmod Make a file execuable: chmod +x script_name or chmod 755 script_name Grant all rights: chmod +rwxrwxrwx /path/to/folder/or/file Remove all rights: chmod -rwxrwxrwx /path/to/folder/or/file chmod: 4 - read 2 - write 1 - execute -------------------- = 7

chown_chgrp

Anonymous (anonymous@undisclosed.example.com) — 2017-12-09T00:19:33+00:00

Home tmade.de Home Wiki CHOWN Change Archive / File owner chown myuser:myuser filename #Changes file "filename" to user "myuser" and group "myuser" CHGRP Change the group of each FILE to GROUP. chgrp users filename #Changes file "filename" to group "users"

chown

Anonymous (anonymous@undisclosed.example.com) — 2017-12-09T00:19:33+00:00

CHOWN Change Archive / File owner chown myuser:myuser filename #Changes "filename" to user "myuser" and group "myuser" chown -R user:group filename #Change recursiv "filename" to user "myuser" and group "myuser"

cut

Anonymous (anonymous@undisclosed.example.com) — 2018-09-21T18:55:00+00:00

Home tmade.de Home Wiki cut cut -d " " -f1 | head -n 1 #Output first column and first line cut -d ":" -f 1,3 /etc/passwd #Output 1th and 3rd line cut -d " " -f1 | sed sed -n "$i"p file #search line "i" in file cut -d " " -f1 | sed -n "1"p file #search line "1" in file

export

Anonymous (anonymous@undisclosed.example.com) — 2017-12-09T00:19:34+00:00

Home tmade.de Home Wiki EXPORT Export Environment Variable: export JAVA_HOME='/usr/java/jdk1.6.0_06' export JAVA_HOME='/usr/java' export JDK_HOME='/usr/java' export J2RE_HOME='/usr/java/jre' export JRE_HOME='/usr/java/jre' export ANT_HOME='/usr/ant/' export PATH=$PATH:/data/myscripts export PATH="${PATH/\/usr\/bin/}" #Remove "/usr/bin" from path export PATH="${PATH/\/path\/to\/remove/}" #Remove "/path/to/remove" export PATH=/usr/local/custom:$PATH #Add path …

find

Anonymous (anonymous@undisclosed.example.com) — 2024-03-21T13:09:13+00:00

Home tmade.de Home Wiki find find . -printf "%T@ %Tx %TX %p\n" | sort -n -r | head | cut -d ' ' -f 2- #Find newest file in actual directory find . -printf "%T@ %Tx %TX %p\n" | sort -n | head | cut -d ' ' -f 2- #Find oldest file in actual directory find / -name filename #Find file "filename" in / find / -uid user_ID -exec rm {}\; #Delete files from any user (systemwide): find /home -mtime +7 -na…

groupmod

Anonymous (anonymous@undisclosed.example.com) — 2017-12-09T00:19:34+00:00

Home tmade.de Home Wiki GROUPMOD groupmod –g 109 tomcat #109 = group-ID of the new group groupmod –R group mygroup #remove „group“ of the group „mygroup“

if-for-while-function-variable

Anonymous (anonymous@undisclosed.example.com) — 2026-01-19T14:23:56+00:00

Home tmade.de Home Wiki Variabel variabel=value echo $variabel Debug Set set -x Unset set +x IF/ELSE The “if” syntax is dependant on the kind of condition. Basically there are 3 types: 1. file 2. integer 3. string File Example “file”: file=/test if [ -e $file ] then echo "$file exist." else echo "$file does not exist." fi

scripts

Anonymous (anonymous@undisclosed.example.com) — 2021-06-22T13:36:40+00:00

Home tmade.de Home Wiki Scripts In this area you´ll find some usefull scripts. Filecheck The following script will check whether a file in a directory isn´t older than 65 minutes and not smaller than 250k #!/bin/sh t=0 first_check () { timestamp=`/usr/bin/find /opt/backup/mysql_hourly/* -mmin -65 | wc -l` if [ $timestamp -ne "0" ] then echo "Actual file exists" 1> /dev/null size=`/usr/bin/find /opt/backup/mysql_hourly/* -size -250k | wc -l` if [ $size -eq "0" ] …

sed

Anonymous (anonymous@undisclosed.example.com) — 2024-10-09T14:24:56+00:00

Home tmade.de Home Wiki sed Replace 12345 with 678910 in file mytest.txt and output to edited.txt sed 's/12345/678910/g' mytest.txt > edited.txt #Replace all occurencies sed 's/12345/678910/' mytest.txt > edited.txt #Replace single occurency sed -i 's/12345/678910/g' mytest.txt #Inline replace of all occurencies sed -i 's/12345/678910/' mytest.txt #Inline replace single occurency sed -i "s/V201/V210/" *_c.pa…

su_sudo

Anonymous (anonymous@undisclosed.example.com) — 2019-10-09T13:21:22+00:00

Home tmade.de Home Wiki SU, SUDO su Start a programm or script as user xy. Example: su - username -c /path/to/programm/or/binary su - oracle -c script.sh #Starts "script.sh" with user "oracle" su - user -c whoami su -s /bin/bash -c "/scripts/script.sh" mysql sudo -u mysql /scripts/script.sh