[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

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howtos:general_admin:cli_constructs_and_useful_info [2012/10/21 10:37 (UTC)] – [Useful commands and info] htexmexhhowtos:general_admin:cli_constructs_and_useful_info [2013/04/02 15:19 (UTC)] (current) – [Constructs] htexmexh
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 ls -1 /var/log/packages | rev | cut -d - -f 1-3 --complement | rev ls -1 /var/log/packages | rev | cut -d - -f 1-3 --complement | rev
 </code> </code>
-Or if you wanted to get the full patch of a file, minus the suffix.+Or if you wanted to get the full path of a file, minus the suffix.
 <code bash> <code bash>
 echo /proc/config.gz | rev | cut -d. -f1 --complement | rev echo /proc/config.gz | rev | cut -d. -f1 --complement | rev
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 bash-4.2$  bash-4.2$ 
 </code> </code>
-Clearly you need to quote a file with spaces. You could use single quotes here, because no variable were inside the quotes. You should not quote in this case:+Clearly you need to quote a file with spaces. You could use single quotes here, because no variables were inside the quotes. You should not quote in this case:
 <code bash> <code bash>
 bash-4.2$ for i in $(seq 1 10); do printf "$i "; done; echo;   bash-4.2$ for i in $(seq 1 10); do printf "$i "; done; echo;  
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 === External Links === === External Links ===
   * http://www.grymoire.com/Unix/Quote.html   * http://www.grymoire.com/Unix/Quote.html
-==== Regex ====+==== Regular expressions ====
 === Basic === === Basic ===
   * ''.'' matches any single character.   * ''.'' matches any single character.
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     * Example: ''\<[tT]he\>'' matches the word ''the'' or ''The''.     * Example: ''\<[tT]he\>'' matches the word ''the'' or ''The''.
   * ''*'' matches any number of the previous character or nothing = no character. Example: ''[0-9]*'' which will match any number of numbers. ''.*'' matches any number of anything.   * ''*'' matches any number of the previous character or nothing = no character. Example: ''[0-9]*'' which will match any number of numbers. ''.*'' matches any number of anything.
-=== Extended ===+=== Extended regular expressions ===
 The following must be supported by the program for them to work. For example for grep you must run ''egrep'' or ''grep -E''. The following must be supported by the program for them to work. For example for grep you must run ''egrep'' or ''grep -E''.
   * ''+'' matches any number of the previous character, like ''*'', but there must be at least one to match, so it will not match nothing or no character.   * ''+'' matches any number of the previous character, like ''*'', but there must be at least one to match, so it will not match nothing or no character.
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 </code> </code>
 === cmp === === cmp ===
-This can compare two files byte by byte, and can be more useful that checksums. For example, after you burn a CD/DVD, you can run:+This can compare two files byte by byte, and can be more useful than checksums. For example, after you burn a CD/DVD, you can run:
 <code bash> <code bash>
 cmp slackware.iso /dev/sr0 cmp slackware.iso /dev/sr0
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   * I quoted ''man comm''   * I quoted ''man comm''
   * I used ''man grep'' for the regex section.   * I used ''man grep'' for the regex section.
 +  * Written by [[wiki:user:htexmexh|H_TeXMeX_H]]
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-{{tag>howtos software author_htexmexh work_in_progress}}+{{tag>howtos software author_htexmexh}}
 howtos:general_admin:cli_constructs_and_useful_info ()